Short Citation:
Pacific Islands Fisheries Science Center, 2021: Guam Long-term Coral Reef Monitoring Program Coral Colony Size and Condition Surveys since 2010, https://www.fisheries.noaa.gov/inport/item/47781.

Item Identification

Title: Guam Long-term Coral Reef Monitoring Program Coral Colony Size and Condition Surveys since 2010
Short Name: Guam LTMP Coral Colony Size and Condition Surveys since 2010
Status: In Work
Publication Date: 2014
Abstract:

The Government of Guam's Long-term Coral Reef Monitoring Program (GLTMP), coordinated through the Guam Coastal Management Program until October 2013 and now coordinated through the University of Guam Marine Laboratory, involves the collection of data for a suite of coral reef ecosystem health parameters at several high priority reef sites around the island of Guam. The program currently utilizes a split-panel sampling approach, whereby a mix of permanent and non-permanent sampling stations (one sampling station = one transect) are visited within each site. The monitoring sites were selected by an advisory body comprised of reef managers, researchers, and technicians. The locations of the sampling stations within each site are generated randomly using GIS software. Various coral reef surveys are carried out on an annual or biennial basis along the seaward slope between 7 and 15 m depth in the Tumon Bay Marine Preserve, East Agana Bay, the Piti Bomb Holes Marine Preserve, the Achang Reef Flat Marine Preserve, and the eastern side of the Cocos Barrier Reef (Cocos-East). Data collection is also carried out on a less frequent basis along the seaward slope (5–8 m) in Fouha Bay and along the reef margin (1–2 m) and slope (2–15 m) of Western Shoals, in Apra Harbor. The surveys, which are conducted by University of Guam Marine Lab and NOAA PIRO biologists, currently include benthic photo transects, quadrat surveys for coral colony size and condition, stationary point count fish surveys, macroinvertebrate belt transects, and chain-length rugosity surveys. These surveys have been conducted at the Tumon and East Agana sites since 2010 and the Piti site since 2012. Data collection for the Achang and Cocos-East sites has occurred in 2014 and 2018, and at the Fouha Bay site in 2015 and 2019. Baseline data is available for the Western Shoals site from 2011 but this site has not been re-visited since its establishment due to shifting management priorities.

Corals are the main contributor to coral reef accretion, provide critical habitat for numerous reef organisms, and serve as a food source for some reef organisms. In recognition of the critical important of corals, coral colony size and condition surveys are a key component of the Guam Long-term Coral Reef Monitoring Program. Coral colony size and condition surveys have been conducted at high priority reef sites around Guam since August 2010. The monitoring team assesses the size and condition of all coral colonies found within quadrats placed every 5 meters along 30-m transects (15-m transects for the Western Shoals site, 25 m for other sites prior to 2018). These monitoring data on coral communities provide results on coral colony density, size, condition, and diversity; allow for exploration of community structure by functional group and size; and can be used to detect changes in coral communities over time.

Purpose:

The coral quadrat data are collected as part of the Guam Long-term Coral Reef Monitoring Program, which documents a number of important parameters related to ecosystem health; these parameters are grouped into three categories: water quality, benthic habitat, and associated biological communities. Many of these parameters are indicators of stressors, and significant changes in these parameters will likely raise concern and possibly trigger management actions. Data collected for these indicators provide important information about the resilience of high priority reef areas around Guam. Monitoring these parameters allows resource managers to evaluate the effectiveness of specific management strategies, and inform the development of new management actions.

Notes:

Loaded by FGDC Metadata Uploader, batch 10196, 11-05-2017 15:19

The following FGDC sections are not currently supported in InPort, but were preserved and will be included in the FGDC export:

- Spatial Reference Information (FGDC:spref),

Supplemental Information:

Coral colony size and condition data have been collected since 2010 (with the noted exceptions below) in:

Tumon Bay in 2010 (10 permanent and 10 non-permanent stations), 2012 (12 permanent and 9 non-permanent stations), 2014 (12 permanent and 4 non-permanent stations), 2015 (12 permanent and 10 non-permanent stations), 2017 (12 permanent and 2 non-permanent stations), 2018 (4 permanent stations), 2019 (12 permanent stations). Coral colony size and condition data were not collected at the Tumon Bay site in 2020.

East Agana Bay in 2010 (10 permanent and 10 non-permanent stations), 2012 (10 permanent stations), 2014 (10 permanent stations), 2015 (10 permanent stations), 2017 (10 permanent and 12 non-permanent stations), and 2019 (9 permanent stations). Coral colony size and condition data were not collected at the East Agana Bay site in 2018 or 2020.

Western Shoals in 2011 (11 permanent and 12 non-permanent stations)

Piti Bay in 2012 (10 permanent and 10 non-permanent stations), 2014 (10 permanent and 2 non-permanent stations), and 2017/18 (8 permanent stations). Coral colony size and condition data were not collected at the Piti Bay site in 2020.

Achang in 2014 (8 permanent and 3 non-permanent stations) and 2018 (9 permanent stations).

Cocos-East in 2018 (3 permanent stations). Coral colony size and condition data were not collected at the Cocos-East site in 2014.

Fouha Bay in 2015 (13 permanent stations) and 2019 (6 permanent stations).

The analysis of benthic images collected during surveys between 2017 and 2020 is on-going; these data will be provided upon completion of the analysis and QC process

Keywords

Theme Keywords

Thesaurus Keyword
UNCONTROLLED
CoRIS Discovery Thesaurus Numeric Data Sets > Biology
CoRIS Theme Thesaurus EARTH SCIENCE > Biosphere > Ecological Dynamics > Species Richness
CoRIS Theme Thesaurus EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment
CoRIS Theme Thesaurus EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Coral Colony Size and Condition
CoRIS Theme Thesaurus EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Coral Colony Size and Condition > Quadrat Monitoring
CoRIS Theme Thesaurus EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Rapid assessment studies
CoRIS Theme Thesaurus EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs
CoRIS Theme Thesaurus EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology
CoRIS Theme Thesaurus EARTH SCIENCE > Oceans > Marine Biology > Coral
CoRIS Theme Thesaurus EARTH SCIENCE > Oceans > Marine Biology > Coral Communities
CRCP Project 488
CRCP Project Guam Coral Reef Monitoring Data Management Initiative
ISO 19115 Topic Category 002
ISO 19115 Topic Category biota
PARR Exclusion Obsolete
None Coral
None Coral Colony Condition
None Coral Colony Size
None Coral Colony Size and Condition Survey
None Coral Disease
None Coral Partial Mortality
None Coral Quadrat Survey
None Coral Reef Ecosystem
None Coral Species Richness
None Guam Long-term Coral Reef Monitoring Program
None Long-term Monitoring Program
None Marine Ecosystem
None Permanent Quadrat
None Rapid Ecological Assessments
None REA

Spatial Keywords

Thesaurus Keyword
UNCONTROLLED
CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > Guam > Achang (13N144E0064)
CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > Guam > Cocos Barrier Reefs (13N144E0001)
CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > Guam > East Agana Bay (13N144E0063)
CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > Guam > Fouha Bay (13N144E0024)
CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > Guam > Guam (13N144E0000)
CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > Guam > Piti Bay (13N144E0061)
CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > Guam > Tumon Bay (13N144E0004)
CoRIS Place Thesaurus COUNTRY/TERRITORY > United States of America > Guam > Western Shoal (13N144E0062)
CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Guam > Achang (13N144E0064)
CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Guam > East Agana Bay (13N144E0063)
CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Guam > Fouha Bay (13N144E0024)
CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Guam > Guam (13N144E0000)
CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Guam > Piti Bay (13N144E0061)
CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Guam > Tumon Bay (13N144E0004)
CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Guam > Western Shoal (13N144E0062)
CoRIS Place Thesaurus OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Guam Reefs > Cocos Barrier Reefs (13N144E0001)
None Mariana Archipelago
None Mariana Islands
None Marianas

Physical Location

Organization: University of Guam Marine Laboratory
City: Mangilao
State/Province: GU
Country: USA

Data Set Information

Data Set Scope Code: Data Set
Data Set Type: Database
Maintenance Frequency: As Needed
Data Presentation Form: Table (digital)
Entity Attribute Overview:

Raw survey data includes metadata for each survey (where, when, who, area); site characteristics (depth, reef type, habitat, exposure); individual adult and juvenile coral observations identified to the lowest taxonomic level possible (usually species) including morphology, empirical size measurement, and all other recorded colony attributes including partial mortality and condition.

Entity Attribute Detail URL: https://www.fisheries.noaa.gov/inport/item/47786
Distribution Liability:

While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, the University of Guam Marine Laboratory cannot assume liability for any damages caused by errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. The University of Guam Marine Laboratory makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.

Data Set Credit: Guam Coastal Management Program, NOAA Pacific Islands Regional Office, and University of Guam Marine Lab.

Support Roles

Data Steward

CC ID: 597266
Date Effective From: 2010
Date Effective To:
Contact (Person): Burdick, David R
Address: 303 University Dr.
Mangilao, GU 96913
USA
Email Address: burdickd@triton.uog.edu
Phone: 671-735-2175
Business Hours: 0800-1700 Chamorro Standard Time (GMT+10)

Distributor

CC ID: 597267
Date Effective From: 2010
Date Effective To:
Contact (Person): Burdick, David R
Address: 303 University Dr.
Mangilao, GU 96913
USA
Email Address: burdickd@triton.uog.edu
Phone: 671-735-2175
Business Hours: 0800-1700 Chamorro Standard Time (GMT+10)

Metadata Contact

CC ID: 597268
Date Effective From: 2010
Date Effective To:
Contact (Person): Burdick, David R
Address: 303 University Dr.
Mangilao, GU 96913
USA
Email Address: burdickd@triton.uog.edu
Phone: 671-735-2175
Business Hours: 0800-1700 Chamorro Standard Time (GMT+10)

Originator

CC ID: 597269
Date Effective From: 2010
Date Effective To:
Contact (Organization): NOAA Coral Reef Conservation Program (CRCP) (CRCP)
Address: 1305 East West Highway 10th Floor
Silver Spring, MD 20910-3281
Phone: (301) 713-3155
URL: http://coralreef.noaa.gov

Point of Contact

CC ID: 597270
Date Effective From: 2010
Date Effective To:
Contact (Person): Burdick, David R
Address: 303 University Dr.
Mangilao, GU 96913
USA
Email Address: burdickd@triton.uog.edu
Phone: 671-735-2175
Business Hours: 0800-1700 Chamorro Standard Time (GMT+10)

Principal Investigator

CC ID: 597461
Date Effective From: 2017
Date Effective To:
Contact (Person): Burdick, David R
Address: 303 University Dr.
Mangilao, GU 96913
USA
Email Address: burdickd@triton.uog.edu
Phone: 671-735-2175
Business Hours: 0800-1700 Chamorro Standard Time (GMT+10)

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Description:

Tumon Bay

Extent Group 1 / Geographic Area 1

CC ID: 597472
W° Bound: 144.789408
E° Bound: 144.798507
N° Bound: 13.517207
S° Bound: 13.510711
Description

These bounding coordinates pertain to the Tumon Bay site boundaries modified after the 2010 survey effort and prior to the 2012 survey effort; these are the current boundaries for the Tumon Bay monitoring site.

Extent Group 1 / Geographic Area 2

CC ID: 597071
W° Bound: 144.784502
E° Bound: 144.795528
N° Bound: 13.512988
S° Bound: 13.508506
Description

These bounding coordinates pertain to the original Tumon Bay site surveyed in 2010. The site boundaries were modified prior to the 2012 surveys; the coordinates of the modified site boundaries are presented in a separate Geographic Area above.

Extent Group 1 / Time Frame 1

CC ID: 597494
Time Frame Type: Range
Start: 2012-09-05
End: 2012-11-19
Description:

Time frame for coral colony and condition surveys carried out in 2012 at the current Tumon Bay site, the boundaries of which were modified after the 2010 survey effort but before the 2012 survey effort.

Extent Group 1 / Time Frame 2

CC ID: 597711
Time Frame Type: Range
Start: 2014-09-03
End: 2014-09-09
Description:

Time frame for coral colony and condition surveys carried out in 2014 at the current Tumon Bay site, the boundaries of which were modified after the 2010 survey effort but before the 2012 survey effort.

Extent Group 1 / Time Frame 3

CC ID: 597712
Time Frame Type: Range
Start: 2015-06-23
End: 2015-07-01
Description:

Time frame for coral colony and condition surveys carried out in 2015 at the current Tumon Bay site, the boundaries of which were modified after the 2010 survey effort but before the 2012 survey effort.

Extent Group 1 / Time Frame 4

CC ID: 597715
Time Frame Type: Range
Start: 2017-04-10
End: 2017-05-17
Description:

Time frame for coral colony and condition surveys carried out in 2017 at the current Tumon Bay site, the boundaries of which were modified after the 2010 survey effort but before the 2012 survey effort.

Extent Group 1 / Time Frame 5

CC ID: 597070
Time Frame Type: Range
Start: 2010-08-04
End: 2010-09-03
Description:

Time frame of coral colony and condition surveys carried out within the original Tumon Bay site as established in 2010. The boundaries of the Tumon Bay site changed after the 2010 surveys were carried out and prior to the 2012 surveys.

Extent Group 1 / Time Frame 6

CC ID: 896881
Time Frame Type: Discrete
Start: 2018-10-23
Description:

Time frame for (incomplete) coral colony and condition surveys carried out in 2018 at the current Tumon Bay site, the boundaries of which were modified after the 2010 survey effort but before the 2012 survey effort.

Extent Group 1 / Time Frame 7

CC ID: 896882
Time Frame Type: Range
Start: 2019-07-02
End: 2019-08-23
Description:

Time frame for coral colony and condition surveys carried out in 2019 at the current Tumon Bay site, the boundaries of which were modified after the 2010 survey effort but before the 2012 survey effort.

Extent Group 2

Extent Description:

East Agana Bay

Extent Group 2 / Geographic Area 1

CC ID: 597497
W° Bound: 144.758065
E° Bound: 144.766983
N° Bound: 13.491396
S° Bound: 13.483792
Description

These bounding coordinates pertain to the current boundaries for the East Agana Bay site, which has been monitored since 2010

Extent Group 2 / Time Frame 1

CC ID: 597498
Time Frame Type: Range
Start: 2010-09-07
End: 2010-11-26
Description:

Time frame for coral colony and condition surveys carried out in 2010 at the current East Agana Bay site, the boundaries of which have been consistent since the site's establishment in 2010

Extent Group 2 / Time Frame 2

CC ID: 597716
Time Frame Type: Range
Start: 2012-11-16
End: 2012-11-28
Description:

Time frame for coral colony and condition surveys carried out in 2012 at the current East Agana Bay site, the boundaries of which have been consistent since the site's establishment in 2010

Extent Group 2 / Time Frame 3

CC ID: 597717
Time Frame Type: Range
Start: 2014-09-10
End: 2014-09-16
Description:

Time frame for coral colony and condition surveys carried out in 2014 at the current East Agana Bay site, the boundaries of which have been consistent since the site's establishment in 2010

Extent Group 2 / Time Frame 4

CC ID: 597718
Time Frame Type: Range
Start: 2016-02-16
End: 2016-04-05
Description:

Time frame for coral colony and condition surveys carried out in 2016 at the current East Agana Bay site, the boundaries of which have been consistent since the site's establishment in 2010

Extent Group 2 / Time Frame 5

CC ID: 597785
Time Frame Type: Range
Start: 2017-07-12
End: 2017-07-20
Description:

Time frame for coral colony and condition surveys carried out in 2017 at the current East Agana Bay site, the boundaries of which have been consistent since the site's establishment in 2010

Extent Group 2 / Time Frame 6

CC ID: 896883
Time Frame Type: Range
Start: 2019-09-05
End: 2019-09-06
Description:

Time frame for coral colony and condition surveys carried out in 2019 at the current East Agana Bay site, the boundaries of which have been consistent since the site's establishment in 2010

Extent Group 3

Extent Description:

Western Shoals

Extent Group 3 / Geographic Area 1

CC ID: 597500
W° Bound: 144.653292
E° Bound: 144.656443
N° Bound: 13.454042
S° Bound: 13.449599
Description

These bounding coordinates pertain to the Western Shoals monitoring site in Apra Harbor. The Western Shoals site has not been re-surveyed since 2011 due to a shift in management priorities.

Extent Group 3 / Time Frame 1

CC ID: 597544
Time Frame Type: Range
Start: 2011-07-11
End: 2011-08-19
Description:

Time frame for coral colony and condition surveys carried out at the Western Shoals site in 2011. Subsequent surveys have not been carried out at this site due to a shift in management priorities.

Extent Group 4

Extent Description:

Piti (Tepungan) Bay

Extent Group 4 / Geographic Area 1

CC ID: 597640
W° Bound: 144.683913
E° Bound: 144.697634
N° Bound: 13.47632
S° Bound: 13.468317
Description

These bounding coordinates pertain to the Piti (Tepungan) Bay site, which has been surveyed since 2012.

Extent Group 4 / Time Frame 1

CC ID: 597676
Time Frame Type: Range
Start: 2012-07-23
End: 2012-08-31
Description:

Time frame for coral colony and condition surveys carried out within the Piti (Tepungan) Bay site in 2012

Extent Group 4 / Time Frame 2

CC ID: 597727
Time Frame Type: Range
Start: 2014-09-17
End: 2014-11-13
Description:

Time frame for coral colony and condition surveys carried out within the Piti (Tepungan) Bay site in 2014

Extent Group 4 / Time Frame 3

CC ID: 896884
Time Frame Type: Range
Start: 2017-11-15
End: 2017-12-15
Description:

Time frame for coral colony and condition surveys carried out within the Piti (Tepungan) Bay site in 2017

Extent Group 4 / Time Frame 4

CC ID: 896885
Time Frame Type: Range
Start: 2018-03-01
End: 2018-03-09
Description:

Time frame for coral colony and condition surveys carried out within the Piti (Tepungan) Bay site in 2018

Extent Group 5

Extent Description:

Achang

Extent Group 5 / Geographic Area 1

CC ID: 597729
W° Bound: 144.69765
E° Bound: 144.712233
N° Bound: 13.242611
S° Bound: 13.239282
Description

These bounding coordinates pertain to the current Achang monitoring site boundaries, which were established in 2014.

Extent Group 5 / Time Frame 1

CC ID: 597730
Time Frame Type: Range
Start: 2014-10-22
End: 2014-10-27
Description:

Time frame for coral colony and condition surveys carried out in 2014 at the Achang site

Extent Group 5 / Time Frame 2

CC ID: 896886
Time Frame Type: Range
Start: 2018-07-26
End: 2018-08-09
Description:

Time frame for coral colony and condition surveys carried out in 2018 at the Achang site

Extent Group 6

Extent Description:

Cocos-East

Extent Group 6 / Geographic Area 1

CC ID: 597732
W° Bound: 144.674888
E° Bound: 144.685944
N° Bound: 13.23992
S° Bound: 13.235939
Description

These bounding coordinates pertain to the current Cocos-East site, which was established in 2014

Extent Group 6 / Time Frame 1

CC ID: 597733
Time Frame Type: Range
Start: 2014-10-27
End: 2014-10-28
Description:

Time frame for coral colony and condition surveys carried out in 2014 at the Cocos-East site

Extent Group 6 / Time Frame 2

CC ID: 896887
Time Frame Type: Discrete
Start: 2018-08-24
Description:

Time frame for coral colony and condition surveys carried out in 2018 at the Cocos-East site

Extent Group 7

Extent Description:

Fouha Bay

Extent Group 7 / Geographic Area 1

CC ID: 597735
W° Bound: 144.653677
E° Bound: 144.656082
N° Bound: 13.305903
S° Bound: 13.303514
Description

These bounding coordinates pertain to the current Fouha Bay monitoring site, which was established in 2015

Extent Group 7 / Time Frame 1

CC ID: 597736
Time Frame Type: Range
Start: 2015-05-06
End: 2015-10-27
Description:

Time frame for coral colony and condition surveys carried out in 2015 at the Fouha Bay site

Extent Group 7 / Time Frame 2

CC ID: 896888
Time Frame Type: Discrete
Start: 2019-06-04
Description:

Time frame for coral colony and condition surveys carried out in 2019 at the Fouha Bay site

Access Information

Security Class: Unclassified
Security Classification System:

Not applicable

Security Handling Description:

Not applicable

Data Access Procedure:

Data can be accessed online via the NOAA National Centers for Environmental Information (NCEI) Ocean Archive or by contacting David Burdick at burdickd@triton.uog.edu.

Data Access Constraints:

None

Data Use Constraints:

Please cite the Guam Coastal Management Program when using data collected prior to October 2013. Guam Coastal Management Program, Guam Bureau of Statistics and Plans, Government of Guam. Please cite the University of Guam Marine Laboratory when using data collected after (and including) October 2013.

Example citation:

For data collected from 2010 to 2012:

Guam Coastal Management Program (2019). Guam Long-term Coral Reef Monitoring Program Coral Colony Size and Condition Surveys since 2010. NOAA's National Center for Environmental Information, https://www.fisheries.noaa.gov/inport/item/47781.

For data collected after 2012:

University of Guam Marine Laboratory (2019). Guam Long-term Coral Reef Monitoring Program Coral Colony Size and Condition Surveys since 2010. NOAA's National Center for Environmental Information, https://www.fisheries.noaa.gov/inport/item/47781.

Metadata Access Constraints:

None

Metadata Use Constraints:

None

Distribution Information

Distribution 1

CC ID: 597460
Start Date: 2010-07-23
End Date: 2019-09-06
Download URL: http://accession.nodc.noaa.gov/accession#
Distributor:
File Name: GLTMP_coral_2010-2019.csv
Description:

coral observations from Guam Long-term Coral Reef Monitoring Program monitoring sites between 2010 and 2019

File Type: csv (comma-separated values)

URLs

URL 1

CC ID: 597076
URL: https://guamcoralreefmonitoring.files.wordpress.com/2020/02/guam_ltmp_spring2019_report_final-2.pdf
Name: A report of the Comprehensive Long-term Coral Reef Monitoring at Permanent Sites on Guam Project
URL Type:
Online Resource
File Resource Format: PDF
Description:

End-of-grant report that includes detailed information about the monitoring program's background and survey methodology, as well as the results of an analysis of baseline data collected at the Fouha Bay, Achang, Tepungan (Piti) Bay and the modified Tumon Bay site, and an analysis of time series data collected at the Tumon Bay, East Agana Bay, and Tepungan (Piti) Bay sites.

URL 2

CC ID: 597078
URL: https://guamcoralreefmonitoring.wordpress.com/
URL Type:
Online Resource
Description:

Guam Long-term Coral Reef Monitoring Program website

Technical Environment

Description:

Observations recorded on data sheets are entered into a data management website that populates a Microsoft SQL Server administered by the University of Guam.

Data Quality

Accuracy:

Observations at each site were made by divers who have been trained, and met minimum standards in identifying species present at the survey locations and in assessing colony size and condition. Most data collected through 2019 were collected solely by the Monitoring Program Coordinator, but data for some sites were collected wholly or in part by one other skilled observer.

Bias:

The vast majority of all coral colony and size observations to-date have been made by the Program Coordinator, with a limited amount of data collected by another coral survey specialist. Inter-observer bias is minimized through consistent training and calibration procedures.

Comparability:

Improvement over time in observers' general level of skill with the survey method, and an evolving understanding of the coral taxa at the monitoring sites, should be taken into account when comparing data across time; however, minor improvements in skill are not expected to have a significant impact on data quality. Comparisons of data across sites or across years must take into account differences in environmental and biological aspects of each site. Comparisons for a give site across time should consider any changes to the site boundaries over time. Please refer to the Extents section of this metadata record to see how the Tumon site boundaries shifted after 2010.

Completeness Report:

Only hard-bottom habitats are surveyed. Surveys are conducted annually to biennially for the Tumon and East Agana sites, but are conducted on a less frequent basis at other sites. In addition, while all permanent sampling stations are generally surveyed each sampling period, surveys are not always conducted at the full set of non-permanent stations for each site during each sampling period. It should also be noted that while five (prior to 2017) or six (after 2017) quadrats were surveyed for the vast majority of all sampling stations within all sites for each sampling period, in some instances there may be fewer quadrats for a given sampling station. Below is a summary of the number of permanent and non-permanent sampling stations surveyed each year for each site:

Tumon Bay: 2010 (10 perm, 10 non-perm); 2012 (12 perm, 9 non-perm); 2014 (12 perm, 4 non-perm); 2015 (12 perm, 10 non-perm); 2017 (12 perm, 2 non-perm); 2018 (4 perm, 0 non-perm); 2019 (12 perm, 0 non-perm)

East Agana Bay: 2010 (10 perm, 10 non-perm); 2012 (10 perm, 0 non-perm); 2014 (10 perm, 0 non-perm); 2015 (10 perm, 0 non-perm); 2017 (10 perm, 0 non-perm); 2018 (no coral quadrat data collected); 2019 (9 perm, 0 non-perm)

Western Shoals: 2011 (11 perm, 12 non-perm)

Piti Bay: 2012 (10 perm, 10 non-perm); 2014 (10 perm, 2 non-perm); 2017-2018 (8 perm, 0 non-perm)

Achang: 2014 (8 perm, 3 non-perm); 2018 (9 perm, 0 non-perm)

Cocos-East: 2014 (no coral quadrat data collected); 2018 (3 perm, 0 non-perm)

Fouha Bay: 2015 (13 perm); 2019 (6 perm)

Data entry and quality control are complete for data collected through 2019.

Conceptual Consistency:

The same methods of data collection were used at each of the stations surveyed, with the exception of surveys at the Western Shoals and Fouha Bay sites, for which larger (1 m x 0.75 m) quadrats were used along 15 m transects. Species-level identifications and coral health assessments likely became more accurate over time, but minor improvements in skill are not expected to have a significant impact on data quality.

Quality Control Procedures Employed:

All observations entered into the database through the online data entry system are compared against observations recorded on the raw data sheet. Once all database records are verified the quality control process is marked as complete for all observations associated with a given station/sampling period. This process is currently carried out by the Program Coordinator or the full-time field technician. It should also be noted that the data management system employs hard and soft validation to minimize data entry errors.

Data Management

Have Resources for Management of these Data Been Identified?: Yes
Approximate Percentage of Budget for these Data Devoted to Data Management: Unknown
Do these Data Comply with the Data Access Directive?: Yes
Is Access to the Data Limited Based on an Approved Waiver?: No
Approximate Delay Between Data Collection and Dissemination: Unknown
Actual or Planned Long-Term Data Archive Location: NCEI-MD
Approximate Delay Between Data Collection and Archiving: Unknown
How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive?:

University of Guam Marine Lab resources and assets

Lineage

Lineage Statement:

The Coral Colony Size and Condition (or Coral Quadrat) Survey methodology, employed by the Guam Long-term Coral Reef Monitoring Program since 2010

Process Steps

Process Step 1

CC ID: 597082
Description:

Coral colony size and condition surveys are carried out at all sampling stations when program capacity is sufficient to do so. All sampling stations have been selected in hard-bottom habitats using a stratified random sampling design, and the stations have been designed using the split-panel approach (combination of fixed and non-fixed transects).

Process Contact: Burdick, David R
Phone (Voice): 671-735-2175
Email Address: burdickd@triton.uog.edu

Process Step 2

CC ID: 598008
Description:

Each sampling station is located using a GPS receiver. Upon reaching a given station, a small weight and line tied to a buoy is carefully lowered to the ocean floor. In optimal situations where four divers are available, two divers enter the water first to carry out the fish surveys. Starting at the weight tied to the buoy, a 30 m transect is laid out [25 m-long transects were used prior to 2017]. The transect is laid out in a clockwise direction relative to the island, following the depth contour if it is readily determined; if the area is relatively flat and a depth contour is not readily discernible the transect is laid at an angle parallel to the reef margin (which is determined prior to entering the water).

Compact digital point and shoot cameras and housings are used by individual observers to document unknown organisms, incidences of coral disease, and species/behaviors of special interest. For the initial establishment of fixed sampling stations, 24 inch rebar is installed at the beginning of the transect and 12 inch rebar is installed at the center and end of the transect; four-inch concrete nails are installed in at least two of the corners of each quadrat used for coral size and condition surveys. For the Western Shoals site, rebar and concrete nails were not used and instead a small PVC float was tied to dead coral with a line at the beginning of the transect and large zip ties were placed at the beginning, middle, and end of the transect. Two small zip ties were used to mark two corners of each permanent quadrat location.

To minimize diver disruptions, the two divers conducting the benthic surveys enter the water after the fish team has finished enumerating fish. In situations where only three divers are available, all three divers enter the water at the same time and remain as a three-person buddy team to ensure diver safety throughout the survey. A fish diver partners with a benthic diver when two fish divers are not available. In this situation, the fish diver lays the transect and conducts the first SPC at 22.5 m while the benthic diver works from 0-15 m; they then switch positions along the transect so that the fish diver can carry out the second SPC.

Process Contact: Burdick, David R
Phone (Voice): 671-735-2175
Email Address: burdickd@triton.uog.edu

Process Step 3

CC ID: 598011
Description:

Shortly after a benthic team diver begins the photo transect on the left side of the transect, another diver then identifies and measures all coral colonies within a 0.5 x 0.5 m quadrat (1 x 0.75 m quadrat for the Western Shoals and Fouha Bay sites) placed at 0 m, 5 m, 10 m, 15 m, 20 m and 25 m along the right side of the transect. In rare instances time limitations prevented data collected for all six quadrat positions, and when 25 m-long transects were used (prior to 2017) quadrats were usually not placed at the 25 m mark. For each quadrat location, the bottom-left corner of the quadrat is coincident with the appropriate meter mark (0 m, 5 m, etc.) along the transect. Only those colonies whose geometric center is within the quadrat are counted. Percent old dead, percent recent dead, and disease type and severity are recorded for each colony. The cause of tissue mortality is also noted if it can be determined with a reasonable degree of confidence. Measurements of the longest dimension and the width of the colony perpendicular to the longest dimension are made. An effort is made to carefully count all visible colonies, including recruits/juvenile corals. Care is taken to prevent the count of remnants of larger colonies as coral recruits/juvenile corals. Any tissue isolate suspected of being a remnant of a larger colony is noted as such, in order to prevent the calculation of erroneous coral colony density. At least two planar view photos are taken of each quadrat in order to maintain a photographic record of all quadrats. Photos are also taken of corals for which species identification is uncertain, of unidentified sources of mortality, or of species or conditions of particular interest.

Process Contact: Burdick, David R
Phone (Voice): 671-735-2175
Email Address: burdickd@triton.uog.edu

Process Step 4

CC ID: 609402
Description:

Raw data include individual colony records with the corresponding methodological information and physical data that reflect the description of the site. An individual colony record for all corals includes colony species/genus identification; maximum diameter (cm); perpendicular diameter (cm); percent old dead; percent recent dead; and condition type and severity; photo (y/n); collected (y/n); fragment (y/n), tissue remnant (y/n); and additional comments. The physical and methodological data for all records includes the following: site, station, station type, date (day, month, year), latitude (dd), longitude (dd), transect number, transect length, quadrat, quadrat size, depth (m), habitat.

Process Contact: Burdick, David R
Phone (Voice): 671-735-2175
Email Address: burdickd@triton.uog.edu

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity (ENT) Guam Long-term Monitoring Program: Coral Observations

Catalog Details

Catalog Item ID: 47781
Metadata Record Created By: Troy T Kanemura
Metadata Record Created: 2017-11-05 15:19+0000
Metadata Record Last Modified By: David R Burdick
Metadata Record Last Modified: 2021-04-14 21:57+0000
Metadata Record Published: 2021-04-14
Owner Org: PIFSC
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Next Review Date: 2022-04-15