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ABSTRACT: Coastal fish populations are typically threatened by multiple human activities, including fishing pressure and run-off of terrestrial pollution. Linking multiple threats to their impacts on fish populations is challenging because the threats may influence a species directly, or indirectly, via its habitats and its interactions with other species. Here we examine spatial variation in abundance of coral reef fish across gradients of fishing pressure and turbidity in Fiji. We explicitly account for multiple pathways of influence to test the alternative hypotheses that (1) habitat moderates predation by providing shelter, so habitat loss only affects prey fish populations if there are abundant predators, (2) habitat change co-drives biomass of both prey and predator functional groups. We examined responses of 7 fish functional groups and found that habitat change co-drives both predator and prey responses to turbidity. Abundances of all functional groups were associated with changes in habitat cover; however, the responses of their habitats to turbidity were mixed. Planktivore and piscivore abundance were lower in areas of high turbidity, because cover of their preferred habitats was lower. Invertivore, browser and grazer abundance did not change strongly over the turbidity gradient, because different components of their habitats exhibited both increases and decreases with turbidity. The effects of turbidity on fish populations were minor in areas where fish populations were already depleted by fishing. These findings suggest that terrestrial run-off modifies the composition of reef fish communities indirectly by affecting the benthic habitats that reef fish use.

Coastal ecosystems can be degraded by poor water quality. Tracing the causes of poor water quality back to land-use change is necessary to target catchment management for coastal zone management. However, existing models for tracing the sources of pollution require extensive data-sets which are not available for many of the world’s coral reef regions that may have severe water quality issues. Here we develop a hierarchical Bayesian model that uses freely available satellite data to infer the connection between land-uses in catchments and water clarity in coastal oceans. We apply the model to estimate the influence of land-use change on water clarity in Fiji. We tested the model’s predictions against underwater surveys, finding that predictions of poor water quality are consistent with observations of high siltation and low coverage of sediment-sensitive coral genera. The model thus provides a means to link land-use change to declines in coastal water quality

Before you leave Samoa, stop and think... Could you be breaking wildlife laws? Souvenirs and handicrafts can sometimes include plant and animal products that are protected under the Convention on International Trade of Endangered Species of Wild Fauna and Flora (CITES).

Before you leave Samoa, stop and think... Could you be breaking wildlife laws? Souvenirs and handicrafts can sometimes include plant and animal products that are protected under the Convention on International Trade of Endangered Species of Wild Fauna and Flora (CITES).

Samoa is home to many threatened species including corals, marine turtles, whales, dolphins and more. The survival of these species is further endangered by the global trade in plants, animals and products that may be made from them.

Samoa's National Environmental Capacity Strategy (NECS) is drawn on the assessment and analysis of priority thematic and cross-cutting capacity needs. These needs have identified priority actions for capacity development and opportunities to promote synergies across the 3 Conventions which are highlighted as project profiles in the NECS. Strategies to implement these project profiles including means of monitoring and evaluation of outcomes are also highlighted in the NECS.

Protecting a species is an aspect of conservation which many organizations and individuals have put effort into so that the balance within the ecosystem can be maintained. Protection implement when factors of threats have been identify. Factors of pressure or predatory that may lead to competition and results in extinction. These are the sequence our world works since the beginning

The community based conservation (CBC)paradigm predicts that sustainable biodiversity can only be achieved if local people perceive benefits from conservation. Through interviews, the situation in Samoa portrays that the CBC of mangroves was received with apprehension because the mangrove biodiversity was more significant than sustaining the livelihood of the local communities. In contrast, Iriomote Island residents were able to achieve maximum socio-economic benefits but to the extent that they were over commercializing the mangrove ecosystem. More research is imperative to find out how biodiversity conservation can be married with sustainable development objectives to sustain the local communities' livelihood.

Merremia peltata, disturbance ecology, tropical cyclones and Samoa. The biology and ecology of Merremia peltata are not well understood. While some regard the species as an exotic invader of Pacific Island ecosystems (Meyer. 2000). others identify the plant as a native species likely to be harmful to native ecosystems (Whistler, 1995a. 2002) or as either native or ancient Polynesian introduction behaving invasively (Space and Flynn.(2002). In Samoa, this species occurs up to an elevation of around 300 meters (Whistler 1995a). and thus only affects lowland ecosystems. This species increases its distribution and abundance in two ways, either vegetatively. by sprawling into neighboring areas and rooting from its nodes or by seeds, although early research in the Solomons observed a low seed viability rate, and creeping may thus be its primary means of reproduction (Bacon. 1982). M. peltata has apparently been in the Pacific for hundreds of years (Whistler, pers. com.) but has only become invasive in the years following tropical cyclones Ofa (1990) and Val (1991) according to comments from local government officials. Disturbance thus appears to be an ecological contributing factor to this invasion.