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Journal of South Pacific Law : Special Issue - Human Rights and Climate Change Law
Climate Change Resilience
Available Online

Aonima, C. & Kumar, S.

,

Bustreo, F.

,

Doebbler, C.

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Fa'anunu, F.

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USP

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Wewerinke, M. & Fa'anunu, F.

2015
Climate change is often referred to as the defining challenge of our time, and it is well known that Pacific Island States are particularly vulnerable to the adverse effects of climate change. Indeed, these adverse effects are already very tangible for most communities across the region. Coastal features are visibly changing, with rising sea-levels, higher king tides and storm surges, saltwater intrusion and changing weather patterns posing an increasing threat to the livelihoods of Pacific Island communities. The threats are amplified by extreme weather events becoming more intense and more damaging as a result of climate change, with Cyclone Pam recently causing loss of human life and catastrophic damage in Vanuatu, and to a lesser extent in the Solomon Islands, Tuvalu and Kiribati. 2 While communities and governments—assisted by regional, international and nongovernmental organizations—are proactively building resilience and adapting to climate change, there is a real risk of much more severe and damaging impacts materializing in the coming decades.3 The threats are so severe that most, if not all, Pacific Island States face the threat of losing some or all of their habitable territory as a result of climate change, with related risks of the loss of traditional livelihoods and large-scale involuntary displacement
Investigations on the soft bottom benthos in a Southwest Pacific atoll lagoon (Uvea, New Caledonia)
Biodiversity Conservation
Available Online

Chevillon Christophe

,

Clavier Jacques

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Garrigue Claire

1998
Microbenthos and macrobenthos were quantitatively studied at 62 stations distributed regularly over the Uvea Atoll lagoon (850 km2). Sampling was performed using both SCUBA and a 0.1 m2 Smith Mclntyre grab. Mean estimates of ATP, chlorophyll a and phaeopigments were 297.3ng/cm2, 77.01 mg/m2 and 35.28 mg/m2 respectively. The mean macrobenthic biomass was 4.14 gAFDW/m2 of which the macrophytobenthos accounts for 39%. The benthic biomass decreased from the coast to the deepest parts of the lagoon. Macrophytes were most abundant in the coastal area and became progressively scarcer with increasing depth. By comparison, sessile species dominated on hard substrates in intermediate and deep zones. The abundance of the surface-deposit feeder group, that dominated the trophic structure of zoobenthos (33% of the macrofauna biomass), could be explained by a microphytic biomass six times higher than macrophytobenthic one in terms of carbon. Carnivores (32%) were mainly represented by necrophagous species, and filter-feeders (27%) by bivalves. Herbivores were rare. Four main benthic communities were identified on the basis of their macrobenthic assemblages using a Detrended Correspondence analysis. They corresponded to (1) a coastal zone, with the highest mud percentage in sediments, (2) an intermediate zone, with moderate depth and dominated by hard substrates, (3) a back reef zone, with thick sand layers, and (4) a deep zone dominated by hard substrates. Relative distribution of the trophic groups varied according to the different zones and suggests distinct functional characteristics for the different benthic assemblages. From a biogeographic point of view, this study highlighted the richness of the Uvea Atoll lagoon in terms of benthic species and biomass, compared to other central Pacific atoll lagoons.