Diversity of deep-water cetaceans and primary productivity

Marine Ecology Progress Series

Hal Whitehead¹  Kristin O#x2019Brien¹  Boris Worm¹ 

关键词: Biodiversity;    Productivity;    Sea surface temperature;    Cetacean;   

DOI  :  10.3354/meps08619

学科分类：海洋学与技术

来源: Inter-Research

【 摘 要 】

ABSTRACT: Recently, it has been suggested that mammal diversity both on land and in the sea is controlled by patterns of primary productivity. Here we tested the hypotheses that large-scale patterns of marine mammal diversity are linked to primary productivity, sea surface temperature (SST) or a combination of these 2 factors. We used a consistently sampled sightings database of deep-water cetaceans in the Atlantic and Pacific Oceans, along with in situ SST measurements and 3 satellite-derived productivity measures matched spatially and temporally to available sightings. Cetacean genus richness peaked in regions of high primary productivity (>1000 to 1500 mg C m^–2 d^–1), but most of this effect is captured by optimal SST in those same regions. Our results show that the best-supported, explanatory models of cetacean diversity included SST, while the addition of satellite-derived measures of productivity did not improve predictive capacity. Marine mammal richness globally peaks around 40°N and S, and may result more directly from optimal SST at these latitudes rather than high oceanic productivity.

【 授权许可】

Unknown