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opencc-zeroOct 2023View details →

NOAA NCCOS Assessment: Agency priorities for mapping coral reef ecosystems in American Samoa, 2023-06-06 to 2023-08-07

Description:NOAA's Coral Reef Conservation Program (CRCP) has identified a need for priority locations based on emerging management requirements in shallow coral reef areas (up to 40 meters depth) surrounding American Samoa. The priorities provided by participating agencies will inform research and monitoring activities, address current and future management needs, and maximize opportunities to leverage and complement existing regional efforts.To meet this need, NOAA's National Centers for Coastal Ocean Science (NCCOS) developed a systematic, quantitative approach and online GIS application to gather seafloor mapping priorities from researchers and coral reef managers. Participants placed virtual coins into a grid overlaid on the project area to express the location of their mapping priorities. They also used pull-down menus to indicate specific mapping data needs and the rationale for their selections. Participants' inputs were compiled and analyzed to identify high priority areas along with their justifications and requirements. A total of nine participant groups entered their mapping priorities into the online tool. Identifying these high priority areas provide a critical spatial framework for prioritizing mapping efforts in shallow coral reef ecosystems in American Samoa.Purpose:The overall goal of the project was to systematically gather and quantify suggestions for mapping needs to support management of shallow coral reef ecosystems along the coast of the American Samoa. This dataset supports these goals by compiling input from a diversity of regional experts on their recommended priorities for mapping data collection.Methods:An advisory group was established which included individuals from NOAA CRCP and NOAA Fisheries. This advisory team customized the prioritization process specifically to meet the needs of CRCP and local coral reef manager priorities. In the online prioritization tool the study area was divided into 160 hexagonal grid cells 2.6 km2 in size. Existing relevant spatial datasets (e.g., bathymetry layers, Sanctuary Protection Areas, etc.) were provided as a digital atlas to help participants understand information and data gaps within the project area and to identify locations they wanted to prioritize for future data collections. Each participant was provided with 50 virtual coins to place into grid cells that they wished to prioritize. They were instructed to place more coins in grid cells that were higher priorities. A maximum of 5 coins could be placed into an individual grid cell. Respondents also reported why these locations were important by selecting a minimum of one, and a maximum of two, management uses from the following list: endangered species management (e.g.,), habitat restoration, monitoring, coastal vulnerability planning, watershed management, fisheries management, consultations and permitting, emergency response, and spatial protection and management. Respondents also reported requirements of data were needed in priority cells. A minimum of one, to a maximum of two choices were selected from the following list: delineations of large topographic features, delineations of hard vs. soft bottom, models of habitat suitability for key taxa or communities, delineations of substrate type (e.g. sand, mud, coral, rock), models of presence/absence or density of corals, identification of coral species and their local environments, documentation of individual specimen condition. Coin values were summarized and mapped to identify high priority areas, reasons for those priorities, and information needs. This ESRI shapefile contains the 2.6 km2 grid cells used in this prioritization and their associated coin values overall, as well as by management use, data product, and mapping methodology. Other summary values include the number of participants, number of participating groups, number of management uses, and number of data requirements. Additionally, coins for microscale (identification of coral species and their local environments and documentation of individual specimen condition), mesoscale (delineations of substrate type, models of presence/absence/density of corals), and regional (delineations of topographic features, delineations of hard vs. soft bottom, models of habitat suitability) requirements were summarized. Also included is a ranking of each grid cell based on the total number of coins, management uses, and participating groups allocating coins in the respective cell. For a complete description of the process and analysis see: Hile et al. 2023, in prep.

opencc-zeroAug 2024View details →

National Checklists: Samoa Species List

Data from: GBIF.org (23 January 2025) GBIF Occurrence Download <a href="https://doi.org/10.15468/dl.vd2ajk" target="_blank" rel="noopener">https://doi.org/10.15468/dl.vd2ajk</a>

Fig. 9 in Basalts from Rose Atoll, American Samoa

Fig. 9. Samoan Island chain in relation to Pacific thermal anomaly tracks based on postulated plume positions near Rose Atoll and in the Manu'a Group islands. Tracks show 5 million year intervals, solid dots, and are calculated on best fit Pacific plates motion (Gaina et al., 2000; R.D. Müller, pers. comm., 2000). Vailulu'u submarine volcano (V) is located at 14°13'S 169°04'W.

Fig. 7 in Basalts from Rose Atoll, American Samoa

Fig. 7. Ba/Nb vs La/Nb diagram of Rose Atoll basalt plots related to N-MORB, Primitive Mantle (cross) and fields of Pacific and Atlantic plume basalts (based on Sun & McDonough, 1989). Solid thick line: Rose Atoll basalt field; thick dotted line: Alexa Bank field; solid thin line: Hawaiian plume tholeiites and Loihi alkalic to transitional basalt fields; thin dashed lines: Atlantic plume basalt fields (St Helena SH, Ascension Island AI, Tristan da Cunah TC, Gough island GI, and Walvis Ridge WR). Rose Atoll data (A, B, C and Agl) from this paper. Samoan plume islands and seamount fields (9 analyses) from Johnson et al. (1986) and Wallis Island (12 analyses) from Price et al. (1991). Hawaiian plume tholeiites (19 analyses, excluding Koolau and other separate source basalts) from Norman & Garcia (1999). Loihi alkalic to transitional basalts (20 analyses) from Garcia et al. (1995).

Fig. 6 in Basalts from Rose Atoll, American Samoa

Fig. 6. Incompatible trace element plots of Rose Island basalts (A, B, C) normalized to primitive mantle, using normalization factors and data after Sun & McDonough (1989). Plots for enriched-type MORB and low 87Sr/86Sr OIB are shown for comparison.

Fig. 2 in Basalts from Rose Atoll, American Samoa

Fig. 2. Al2O3 vs MgO for Manu'a lavas and Rose Atoll samples. The olivine and plagioclase control lines are those of Hubbard (1971).

Fig. 1 in Basalts from Rose Atoll, American Samoa

Fig. 1. Location map of Rose Atoll within the Samoan Island Chain. Vailulu'u submarine volcano (V) is located at

Fig. 8 in Basalts from Rose Atoll, American Samoa

Fig. 8. Nb and Ba related to Zr for Samoan shields, islands and submarine banks. Thick lines: Rose Atoll and Samoan shields; thin lines: Combe Bank, Lalla Rookh bank, Alexa Bank and Wallis Island. Stars: Rose Atoll analyses, this paper. Other data from Natland & Turner (1985), Johnson et al. (1986), Price et al. (1991).

Figure 8 in Substratum stability and coral reef resilience: insights from 90 years of disturbances on a reef in American Samoa

Figure 8. Large coral colonies thrive on solid reef rock blocks in the field of rubble. This demonstrates that substratum stability is the key determining factor under relatively uniform conditions of water quality and larval recruitment.

Figure 2 in Substratum stability and coral reef resilience: insights from 90 years of disturbances on a reef in American Samoa

Figure 2. Water quality in inner Pago Pago Harbor greatly improved and remained improved after tuna canneries were required to modify their waste disposal processes in 1991. Data were taken by the American Samoa Environmental Protection Agency and the figure is from Craig et al. 2005 with permission.

Figure 1 in Substratum stability and coral reef resilience: insights from 90 years of disturbances on a reef in American Samoa

Figure 1. Acropora exposed at low tide on Alfred Mayor's transect near Aua in Pago Pago Harbor in 1917 (reprinted from Mayor 1924 with permission of the Carnegie Institution, Washington, DC).

Figure 3 in Substratum stability and coral reef resilience: insights from 90 years of disturbances on a reef in American Samoa

Figure 3. Density of corals from 1917 to 2007 along the Aua transect from the shore to the reef crest.

Figure 9 in Substratum stability and coral reef resilience: insights from 90 years of disturbances on a reef in American Samoa

Figure 9. Unattached colonies of Pavona divaricata and Porites cylindrica with living tissue on all sides.

opencc-by-4.0Jul 2021View details →

Direct comparison of the tsunami-generated magnetic field with sea level change for the 2009 Samoa and 2010 Chile tsunamis

This is the dataset for the paper of “Direct comparison of the tsunami-generated magnetic field with sea level change for the 2009 Samoa and 2010 Chile tsunamis” in Journal of Geophysical Research: Solid Earth.   This dataset includes three zips: 1. Processed Observation Tsunami Data -- In this zip, there have the observation tsunami magnetic field and sea level change data of 2009 Samoa and 2010 Chile earthquakes which extracted from the data of the TIARES experiment (Suetsugu et al., 2012). 2. Simulated Tsunami Data -- This is the simulated tsunami sea level change and magnetic field of 2009 Samoa and 2010 Chile earthquakes. The tsunami sea level was simulated by JAGURSv5.2 (Baba et al., 2017) and the tsunami magnetic field was simulated by TMTGEMv1.1 (Minami et al., 2017). 3. Converted Tsunami Sea Level Change -- The converted sea level changes were calculated by the 2-D analytical solution of tsunami magnetic field (Minami et al., 2021) using the filtered tsunami magnetic vertical component Bz.

opencc-by-4.0May 2009View details →

Fig. 9. Gnathothlibus samoaensis n in Two New Species of Gnathothlibus Wallengren from Fiji and Samoa and a New Species of Theretra Hübner from New Guinea (Lepidoptera: Sphingidae)

Fig. 9. Gnathothlibus samoaensis n.sp. holotype male, lateral view showing colouration of abdominal segments.

opencc-by-4.0Jun 2009View details →

Fig. 13 in Pacific Flying Foxes (Mammalia: Chiroptera): Two New Species of Pteropus from Samoa, Probably Extinct

Fig. 13. Skin of USNM 8597/37860, lectotype of Pteropus samoensis Peale, 1848. A, dorsal view. B, ventral view.

opencc-by-4.0Jun 2009View details →

Fig. 7 in Pacific Flying Foxes (Mammalia: Chiroptera): Two New Species of Pteropus from Samoa, Probably Extinct

Fig. 7. Skulls of smaller-toothed, medium-sized Pteropus species of the southwest Pacific region. A, Partially cleaned skull of Pteropus fundatus, endemic to Vanuatu (AM M26897, adult male, Mota); B, reconstructed skull of Pteropus allenorum, endemic Samoa (ANSP 1234, unsexed subadult, Upolu); C, skull of Pteropus mahaganus, endemic to the Solomon Archipelago (AM M6280, adult male, Bougainville). Scale bar 5 10 mm.