Factors Affecting the Distribution of Atyid Shrimps in Two Tropical Insular Rivers

Leberer, Trina; Nelson, Steven G.

doi:10.1353/psc.2001.0035

Cited by 19 publications

(21 citation statements)

References 14 publications

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“…Atyid shrimps are common in the freshwater habitats of oceanic islands (Leberer and Nelson 2001). Seven species are recorded in Guam, where distributions are controlled by habitat types, particularly habitat factors such as Atoida mostly occurring in riffles, Caridina mostly in runs and pools.…”

Section: Invertebratesmentioning

confidence: 99%

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: Invertebratesmentioning

confidence: 99%

Wetlands of the Pacific Island region

Ellison

2008

Wetlands Ecol Manage

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“…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. Despite their widespread, even pantropical, distribution, researchers know little about how these groups' complex life cycles or their ecological roles can be disrupted by events such as natural droughts, global warming, or management decisions regarding water diversions and waste disposal.…”

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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“…In that case, spatial variation in abundance was attributed to variation in predator effects rather than to physical features. In addition, barriers, through their effects on predator distribution, can also cause spatial variation in the age structure of a stream's atyid shrimp population (Leberer and Nelson 2001). In Laufuti, KuhJia was absent, but eels (A. marmorata and A. megastoma), which feed heavily on shrimps (Marquet andLamarque 1986, Leberer andNelson 2001), provide predation pressure throughout.…”

Section: Crustaceansmentioning

confidence: 99%

“…In addition, barriers, through their effects on predator distribution, can also cause spatial variation in the age structure of a stream's atyid shrimp population (Leberer and Nelson 2001). In Laufuti, KuhJia was absent, but eels (A. marmorata and A. megastoma), which feed heavily on shrimps (Marquet andLamarque 1986, Leberer andNelson 2001), provide predation pressure throughout. In Laufuti, it appears that some of the species occurring in lower Laufuti may be excluded from middle and upper Laufuti by either dispersal barriers (i.e., falls zone) or lack of habitat (i.e., lack of flowing water) rather than by distribution of predators.…”

Section: Crustaceansmentioning

confidence: 99%

Macrofauna of Laufuti Stream, Tau, American Samoa, and the Role of Physiography in its Zonation

Cook¹

2004

Pacific Science

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Factors Affecting the Distribution of Atyid Shrimps in Two Tropical Insular Rivers

Cited by 19 publications

References 14 publications

Wetlands of the Pacific Island region

Wetlands of the Pacific Island region

An Ecological Perspective on the Biodiversity of Tropical Island Streams

Macrofauna of Laufuti Stream, Tau, American Samoa, and the Role of Physiography in its Zonation

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