S.L. Coles
H. Bolick
J. Marchetti
A. Montgomery
Hawaii Biological Survey
Bishop Museum
Honolulu, Hawaii
2007
Assessment of Invasiveness of the Orange Keyhole Sponge Mycale
Armata in Kaneohe Bay, Oahu, Hawaii Based on Surveys 2005-2006,
Year 2 of Hawaii Coral Reef Initiative (NODC Accession 0033380)
Honolulu, Hawaii
Bishop Museum
https://www.ncei.noaa.gov/archive/accession/0033380
The Orange Keyhole Sponge, Mycale armata Thiele, was unknown in Hawaii
prior to 1996. It was first reported in Pearl Harbor and has been reported
in low abundance from a few coral reef locations near harbors, but in
Kaneohe Bay it has become a major component of the benthic biota in the
south bay in the last 5-10 years. An initial study was conducted in 2004-2005
to determine Mycale armatas distribution, abundance throughout the bay,
its growth rates on marked permanent quadrats, and whether mechanical removal
would be an effective management technique for its control (Coles and Bolick
2006). Findings in the first year from 190 manta board surveys and 19
quantitative photo-transects on 18 reefs throughout Kaneohe Bay indicated
that the sponge had its greatest abundance in the south bay near the
Hawaii Institute of Marine Biology (HIMB) pier and Coconut Island.
Despite the apparent visual dominance of this conspicuous sponge on many
reefs, its maximum coverage measured on any transect in 2004-2005 was 9.2% of
the bottom, with a mean of two transects at this site of 6.5%, and sponge was
substantially less than coral coverage at all sites. However, measurement of
changes in sponge area on ten permanent quadrats photographed quarterly
throughout the year indicated a significant average increase in sponge of 13%.
Attempts to mechanically remove sponge on ten other permanent quadrats was
very time-consuming, requiring up to an equivalent of 22 hr m-2 for removal,
and sponge regrew an significant average of 10% during the year following
removal.
The study was continued for a second year to determine whether changes in
sponge coverage and distribution in the bay could be detected, whether the
first year's rates of increase in sponge cover on permanent quadrats would
continue, and whether a more effective method of sponge control could be
devised. Photo-transects repeated at 11 of the 19 sites from Year 1 indicated
increased sponge cover at all sites with significant increases at 7 of the 11
sites, and highest sponge coverage still occurring in the vicinity of Coconut
Island. The permanent control photo-quadrats remaining from the first year
were re-photographed quarterly and showed a further non-significant increase
of 1.7% during Year 2. Re-growth of sponge on the remaining removal quadrats
averaged a non-significant increase of 6.3%. Four more photoquadrats were
deployed in March 2006 and sponge surfaces on two of these were mechanically
removed, followed by injection of the sponge with air delivered by a 10 cm
long bone necrosis needle. This treatment resulted in mean reduction from
initial values of sponge cover of up to 73% a month later. Four more quadrats
were deployed in May and these were treated by air injection alone, which
showed little visible effect one month later. Sponge on these quadrats were
re-injected with air, and one month later showed mean reductions in sponge of
57%. Some regrowth of sponge occurred on these removal quadrats, resulting in
a net average reduction of 42% below pretreatment conditions for the five of
the six quadrats that remained by the end of the study.
Overall, the two-year study suggests that growth and spread of Mycale armata
on Kaneohe Bay reefs and may now be slowly but steadily extending beyond
its area of highest concentration in the south bay. The air injection method
may provide a means for reducing the range expansion and impact of the sponge
if substantial resources are directed toward controlling this highly invasive
species. Before a large-scale control effort is considered, a pilot study of
reducing the sponge by air injection should be conducted and results monitored
to determine the effectiveness of this means of control in both the area of
highest sponge abundance and at the boundary of present sponge occurrence.
To determine Mycale armata's distribution, abundance throughout the bay, its
growth rates on permanent quadrats, and whether mechanical removal would be
an effective management technique for its control.
NOAASupplemental:Entry_ID: Unknown
Sensor_Name: SCUBA, digital camera
Source_Name: manual
Project_Campaign: Hawaii Coral Reef Initiative
Originating_Center: Bishop Museum
Storage_Medium: Excel, PDF, MS Word, JPEG
Online_size: 848751 kilobytes
Resource Description: NODC Accession Number 0033380
2005
2006
ground condition
None Planned
-157.852
-157.763
21.510
21.412
NCEI Geoportal FilterCoRIS_Metadata
None
Biological survey
coastal studies
coral reef
taxa
marine organisms
coral species
algae species
total biota
nonindigenous and cryptogenic marine taxa
frequency of occurrence of species
distribution and relative abundance of Mycale armata
relative abundance of the invasive algae Dictyosphaeria cavernosa, Gracilaria salicornia, and Kappaphycus sp.
percent cover of Mycale armata, macroalgae, corals and other invertebrates, and substratum types within the photoquadrats
CoRIS Theme Thesaurus
EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral Reef Ecology > Invasive/introduced Species
EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs
CoRIS Discovery Thesaurus
Numeric Data Sets > Biology
ISO 19115 Topic Category
environment
007
biota
002
None
Hawaiian Islands
Oahu
Kaneohe Bay
Coconut Island
CoRIS Region
MHI
CoRIS Place Thesaurus
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Oahu Island > Oahu (21N157W0003)
COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Oahu (21N157W0003)
COUNTRY/TERRITORY > United States of America > Hawaii > Honolulu > Kaneohe Bay (21N157W0004)
OCEAN BASIN > Pacific Ocean > Central Pacific Ocean > Hawaiian Islands > Oahu Island > Kaneohe Bay (21N157W0004)
None
benthic
None
Dataset credit required
Steve L. Coles
Scientist
mailing address
Bishop Museum, 1525 Bernice St.
Honolulu
HI
96817
U.S.A.
(808) 847-8256
(808) 841-8968
slcoles@bishopmuseum.org
9:00 - 5:00PM, Pacific time
E-mail/phone/letter
Hawaii Coral Reef Initiative,Bishop Museum
Excel spreadsheets, PDF, MS Word, JPEG
see Lineage, Process Step
the survey was 100% completed
details at
../data/0-data/Photoquadrats/Method Manual.doc (.pdf)
../data/0-data/Photoquadrats/HCRI Report Year2.doc (.pdf)
Coles, S.L. and H.Bolick, 2006. Assessment of Invasiveness of the Orange
Keyhole Sponge Mycale armata in Kaneohe Bay, Oahu, Hawaii. Final Report,
Year 1. The Hawaii Coral Reef Initiative. Contribution No. 2006-02 to the
Hawaii Biological Survey.
Coles, S.L., and Marchetti,J., Bolick,H, Montgomery,A., 2007. Assessment of
Invasiveness of the Orange Keyhole Sponge Mycale armata in Kaneohe Bay,
Oahu, Hawaii. Final Report, Year 2. The Hawaii Coral Reef Initiative.
Contribution No. 2006-02 to the Hawaii Biological Survey.
Unknown
Steve L. Coles
Scientist
mailing address
Bishop Museum, 1525 Bernice St.
Honolulu
HI
96817
U.S.A.
(808) 847-8256
(808) 841-8968
slcoles@bishopmuseum.org
9:00 - 5:00PM, Pacific time
E-mail/phone/letter
Details are described in
../data/0-data/Photoquadrats/Method Manual.doc (.pdf)
../data/0-data/Photoquadrats/HCRI Report Year2.doc (.pdf)
Directories:
data/0-data files and filenames as received from originator
data/1-data renamed or redundant ASCII (CSV) copies of originals
as prepared for the archive by NODC
The original data is primarily provided as MS Excel spreadsheets.
Redundant ASCII CSV-format copies were made, with
each unique sheet getting a unique file. The name of the file for
each sheet in a spreadsheet is
spreasheetName_sheetName.CSV
In other words, the name of each sheet is concatenated onto the name
of the spreadsheet for each of the CSV files.
Image files are all given in JPEG format.
None
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20210106
20090803
Mr. Patrick C. Caldwell
NOAA/NESDIS/NODC/NCDDC
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FGDC Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
20090803043508
None
20050101
20061231
https://www.coris.noaa.gov/metadata/records/html/nodc_0033380.html
2756