Edge effects in patchy seagrass landscapes: The role of predation in determining fish distribution
نویسندگان
چکیده
a Victorian Marine Science Consortium, PO Box 114, Queenscliff, Vic 3225, Australia b Department of Zoology, The University of Melbourne, Parkville, Vic 3052, Australia c Arthur Rylah Institute, Department of Sustainability and Environment Victoria, PO Box 137, Heidelberg, Vic 3084, Australia d Marine and Freshwater Fisheries Research Institute, DPI Queenscliff Centre, PO Box 114, Queenscliff, Vic 3225, Australia e Australian Rivers Institute — Coast and Estuaries, and Griffith School of Environment, Griffith University, Queensland, 4222, Australia
منابع مشابه
Resource distribution influences positive edge effects in a seagrass fish.
According to conceptual models, the distribution of resources plays a critical role in determining how organisms distribute themselves near habitat edges. These models are frequently used to achieve a mechanistic understanding of edge effects, but because they are based predominantly on correlative studies, there is need for a demonstration of causality, which is best done through experimentati...
متن کاملSeagrass patch size affects fish responses to edges.
1. Patch area and proximity of patch edge can influence ecological processes across patchy landscapes and may interact with each other. Different patch sizes have different amounts of core habitat, potentially affecting animal abundances at the edge and middle of patches. In this study, we tested if edge effects varied with patch size. 2. Fish were sampled in 10 various-sized seagrass patches (...
متن کاملThe Seagrass Effect Turned Upside Down Changes the Prospective of Sea Urchin Survival and Landscape Implications
Habitat structure plays an important mediating role in predator-prey interactions. However the effects are strongly dependent on regional predator pools, which can drive predation risk in habitats with very similar structure in opposite directions. In the Mediterranean Sea predation on juvenile sea urchins is commonly known to be regulated by seagrass structure. In this study we test whether th...
متن کاملThreshold effects of habitat fragmentation on fish diversity at landscapes scales.
Habitat fragmentation involves habitat loss concomitant with changes in spatial configuration, confounding mechanistic drivers of biodiversity change associated with habitat disturbance. Studies attempting to isolate the effects of altered habitat configuration on associated communities have reported variable results. This variability may be explained in part by the fragmentation threshold hypo...
متن کاملEdge effects on fish associated with seagrass and sand patches
Seagrass beds form naturally patchy habitats with large areas of seagrass–sand interface, or edges. Fish were sampled at 3 sites in the temperate waters of Victoria, Australia, using small (0.5 m wide) push nets at 7 positions: unvegetated sand distant from the patch on the seaward side, the sand edge adjacent to the seagrass on the seaward side, the seagrass edge on the seaward side, the middl...
متن کامل