Benthic Community Structure and Invertebrate Drift in a Pacific Island Stream, Kosrae, Micronesia<sup>1</sup>

March, James G.; Benstead, Jonathan P.; Pringle, Catherine M.; Luckymis, Marston

doi:10.1111/j.1744-7429.2003.tb00270.x

Cited by 62 publications

(9 citation statements)

References 16 publications

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“…This started with baseline assessment of the forest resource (Petteys et al 1993) and assessment of values and recommendations for creation of forest reserves (Devoe 1993). Subsequent research has included community structure (Cole et al 1999;Allen et al 2003;Ewel et al 2003;March et al 2003), productivity and growth (Ewel et al 1998a;Devoe and Cole 1998;Allen et al 2000;Pinzón et al 2003;Allen et al 2005;Krauss et al 2006), carbon fluxes (Gleason and Ewel 2002;Ewel 2004, 2005), organic matter dynamics (Gleason et al 2003), sedimentation , disturbance (Ewel et al 1998b;Allen et al 2001;Hauff et al 2006) and wetland valuation (Naylor and Drew 1998;Naylor et al 2002;Drew et al 2005). Other countries in the region are very depauperate of such detailed and interconnected scientific ecological work, and in many none has occurred at all.…”

Section: Ecological Characteristics Populations Communitiesmentioning

confidence: 96%

Wetlands of the Pacific Island region

Ellison

2008

Wetlands Ecol Manage

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The wetlands of 21 countries and territories of the Pacific Islands region are reviewed: Vanuatu, and Wallis and Futuna. The regions' wetlands are classified into seven systems: coral reefs, seagrass beds, mangrove swamps, riverine, lacustrine, freshwater swamp forests and marshes. The diversity of species in each of these groups is at near global maxima at the west of the region, with decline towards the east with increasing isolation, and decreasing island size and age. The community structure is unique in each country, and many have endemic species with the habitat isolation that epitomises this island region. There remain, however, some serious gaps in basic inventory, particularly in freshwater biodiversity. Threats to wetlands include introduced freshwater species, loss of wetlands adjacent to urban growth, downstream effects of mining and land clearance, and over-use of mangrove, seagrass and coral reef resources by predominant subsistence economies that remain in this region. Only five countries are signatories to the Ramsar convention on wetlands, and this only recently with seven sites. Wetland managers have identified the need for community education, baseline surveys and monitoring, better legislation and policy for wetland management, and improved capacity of local communities to allow the wise use of their wetlands.

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Section: Ecological Characteristics Populations Communitiesmentioning

confidence: 96%

Wetlands of the Pacific Island region

Ellison

2008

Wetlands Ecol Manage

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“…As juveniles or postlarvae, they migrate upstream considerable distances over steep terrain and climb up high waterfalls. These taxa are especially well adapted for completing major periods of their life histories in tropical stream drainages, where they play essential roles in aquatic food webs (Covich and McDowell 1996, Crowl et al 2001, March et al 2003a, Williams 2002). These life-history characteristics have resulted in a significant number of shared common genera of fishes, decapods, and gastropods in many streams throughout the tropical Pacific and Caribbean (Fievet et al 2001, Leberer and Nelson 2001, Debrot 2003, March et al 2003b.…”

Section: Geologic and Biological Processesmentioning

confidence: 99%

An Ecological Perspective on the Biodiversity of Tropical Island Streams

Smith

Covich²,

Brasher³

2003

BioScience

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Articles Images of exotic tropical streams and waterfalls are commonly used to denote the beautiful and unique features associated with island landscapes. Yet the continued existence of such scenic habitats is being threatened in a variety of ways. The ecology and the potential for sustainability of insular tropical stream and river drainages are not well understood. Furthermore, it is not yet clear how the concepts derived from studies of continental stream ecosystems in the temperate zone can be effectively applied to understand and manage streams and rivers on islands in tropical areas. With ever-increasing development pressure in these areas, there is a growing need to establish more unified themes for research, management, and conservation of tropical stream ecosystems. This special section of BioScience presents recent research on different types of tropical streams and emerging themes in this area. The articles describe important aspects of how tropical stream ecosystems are structured and how these ecosystems function and change over time in response to natural processes and human activities. Several articles emphasize the magnitude of impacts resulting from human alteration of the physical and biological characteristics of these ecosystems. There is growing recognition, from studies of both temperate continental and tropical insular ecosystems, of the importance of conserving the biological resources of watersheds as well as the other "ecosystem services" they provide, such as a clean water supply, fishery resources, and recreation. In recent years, integration of watershed-scale considerations into management and conservation planning has gained momentum. As these articles illustrate, tropical stream ecologists are developing new approaches to understand, manage, and conserve these environments.These articles also clearly document that the main differences in biodiversity among tropical island streams reflect regional variations in geology, terrain, climate, and land use. However, across a wide range of latitudes, most tropical streams differ significantly from those found on continents by having relatively short, straight, and steep channels in comparatively small, narrow watersheds. Low-latitude island watersheds are often influenced by major fluctuations in precipitation and generally show the effects of exposure to tropical storms, hurricanes, and occasional major droughts (Covich et al. 2003, Oki andBrasher 2003). In contrast to the more seasonally driven temperate stream systems, tropical stream networks tend to be more event driven, and these events may be relatively unpredictable. Because tropical Gordon C. Smith (e-mail: gordon_smith@fws.gov

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“…While 31 families and 53 genera were recorded in Gorgona, 18 families and 27 genera were recorded in Isla del Caño (Springer, 2004), and 40 families (7 orders, no genera-level reports) in Coiba (Boyero & Bailey, 2001). In more remote oceanic islands in the mid Pacific, such as Kosrae in Micronesia, the richness is significantly lower (3 orders and 3 families: March et al, 2003;Benstead et al, 2009) than in continental islands in the Tropical Eastern Pacific.…”

Section: Discussionmentioning

confidence: 99%

“…However, it has been found that island origin, isolation, size, and age, as well as ocean currents and climate change, are important influences at a regional scale (e.g. March, Benstead, Pringle & Luckymis, 2003;Craig, 2003;Benbow, McIntosh, Burky & Way, 2005;Covich, 2006;Benstead, March, Pringle, Ewel & Short, 2009). At the basin scale, stream order and invasion by introduced species are major filters (Englund, 1999).…”

mentioning

confidence: 99%

Patterns at Multi-Spatial Scales on Tropical Island Stream Insect Assemblages (Gorgona Island Natural National Park, Colombia, Tropical Eastern Pacific)

Longo

Blanco

2014

RBT

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Tropical Eastern Pacific island streams (TEPis) differ from other neotropical streams in their rainy climate, mixed sedimentary-volcanic geology and faunal composition. Yet, their relationships between environmental characteristics and stream biota remain unexplored. We analyzed the environmental subject at three spatial scales using a fully nested sampling design (6 streams, 2 reaches within each stream, 2 habitats within each reach, and 4 replicates per habitat) on Gorgona Island (Colombia). Sampling was carried out in two months with contrasting rainfall during early 2009. We studied the spatial variation of assemblage composition and density along with 27 independent variables within two contrasting rainfall conditions. Five stream-scale variables, two reach-scale variables, and five habitat-scale variables were selected using a Canonical Correspondence Analysis (CCA). A partial CCA showed that the total variance explained was 13.98%, while stream-and habitat-scale variables explained the highest proportion of the variance (5.74 and 5.01%, respectively). Dissolved oxygen (as affected by rainfall), high-density use zone (a management category), and sedimentary geology were the best descriptors of insect assemblages. The two latter descriptors affected fine-scale variables such as total benthic organic matter and gravel substratum, respectively. A Nested ANOVA showed significant differences in total density and richness among streams and habitats, and significant differences between the two sampling months regardless of the spatial scale. The evenness showed a significant stream-and habitat-dependent temporal variability. These results suggested that rainfall regime in Gorgona Island might be a driver of insect assemblage dynamics mediated by water chemistry and substratum properties. Spatial assemblage variability here is greater within habitats (among samples), and a minor fraction occurs at habitat-and stream-scales, while no longitudinal pattern was observed probably due to the short courses. Temporal variability should be further studied relative to rainfall and discharge regimes. Rev. Biol. Trop. 62 (Suppl. 1): 65-83. Epub 2014 February 01.

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Benthic Community Structure and Invertebrate Drift in a Pacific Island Stream, Kosrae, Micronesia¹

Cited by 62 publications

References 16 publications

Wetlands of the Pacific Island region

Wetlands of the Pacific Island region

An Ecological Perspective on the Biodiversity of Tropical Island Streams

Patterns at Multi-Spatial Scales on Tropical Island Stream Insect Assemblages (Gorgona Island Natural National Park, Colombia, Tropical Eastern Pacific)

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Benthic Community Structure and Invertebrate Drift in a Pacific Island Stream, Kosrae, Micronesia1

Cited by 62 publications

References 16 publications

Wetlands of the Pacific Island region

Wetlands of the Pacific Island region

An Ecological Perspective on the Biodiversity of Tropical Island Streams

Patterns at Multi-Spatial Scales on Tropical Island Stream Insect Assemblages (Gorgona Island Natural National Park, Colombia, Tropical Eastern Pacific)

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Benthic Community Structure and Invertebrate Drift in a Pacific Island Stream, Kosrae, Micronesia¹