Diversity patterns along and across the Chilean margin: a continental slope encompassing oxygen gradients and methane seep benthic habitats

Javier Sellanes; Carlos Neira; Eduardo Quiroga; Nuria Teixido

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Diversity patterns along and across the Chilean margin: a continental slope encompassing oxygen gradients and methane seep benthic habitats

机译：智利边缘及整个边缘的多样性格局：一个包含氧梯度和甲烷渗入底栖生境的大陆坡

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In the present study we review datasets available for the Chilean margin to assess the relationship between environmental (or habitat) heterogeneity and benthic diversity. Several factors, such as the presence of different water masses, including the oxygen-deficient Equatorial Sub-surface Waters (ESSW) at the continental shelf and upper slope, and the Antarctic Intermediate Waters (AIW) at mid slope depths appear to control the bathymetric distribution of benthic communities. The presence of methane seeps and an extended oxygen minimum zone (OMZ) add complexity to the benthic distribution patterns observed. All these factors generate environmental heterogeneity, which is predicted to affect the diversity patterns both along and across the Chilean continental margin. The response to these factors differs among different faunal size groups: meio-, macro-, and megafauna. Physiological adaptations to oxygen deficiency and constraints related to body size of each group seem to explain the larger-scale patterns observed, while sediment/habitat heterogeneity (e.g. at water mass boundaries, hardgrounds, biogeochemical patchiness, sediment organic content, grain size) may influence the local fauna diversity patterns.

机译：在本研究中，我们回顾了可用于智利边缘的数据集，以评估环境（或栖息地）异质性与底栖生物多样性之间的关系。几个因素，例如不同水团的存在，包括大陆架和上坡的缺氧赤道地下水（ESSW），以及中坡深度的南极中层水（AIW），似乎可以控制水深底栖生物群落的分布。甲烷渗漏的存在和扩展的最小氧气区（OMZ）增加了底栖生物分布的复杂性。所有这些因素都会导致环境异质性，预计将影响智利大陆边缘及整个智利大陆边缘的多样性格局。对这些因素的反应在不同的动物大小组之间有所不同：小型，大型和大型动物。生理上对缺氧的适应以及与每组体重相关的限制似乎可以解释所观察到的更大范围的模式，而沉积物/栖息地的异质性（例如在水质边界，硬质土壤，生物地球化学斑块，沉积物有机物含量，粒度）可能会影响当地动物区系的多样性格局。

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来源
《Marine ecology》 |2010年第1期|111-124|共14页
作者
Javier Sellanes; Carlos Neira; Eduardo Quiroga; Nuria Teixido;
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作者单位

Departamento de Biologia Marina, Universidad Catolica del Norte, Larrondo, Coquimbo, Chile Centra de Investigacion Oceanografica en el Pacifico Sur-Oriental (COPAS), Universidad de Concepcion, Casilla, Concepcion, Chile;

rnIntegrative Oceanography Division, Scripps Institution of Oceanography, La Jolla, CA, USA;

rnCentra de Investigacion en el Ecosistemas de la Patagonia (CIEP), Bilbao, Coyhaique, Chile;

rnCentre for Advanced Studies of Blanes (CEAB-CSIC), Acces Cala Sant Francesc, Blanes, Girona, Spain;

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正文语种 eng
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关键词
benthic biodiversity; chile margin; continental slope; habitat heterogeneity; methane seeps; oxygen minimum zone;

机译：底栖生物多样性;智利边缘大陆坡生境异质性甲烷渗出;氧气最小区;

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7. Diversity patterns along and across the Chilean margin: A continental slope encompassing oxygen gradients and methane seep benthic habitats [O] . Sellanes, J., Neira, C., Quiroga, E., 2010

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Diversity patterns along and across the Chilean margin: a continental slope encompassing oxygen gradients and methane seep benthic habitats

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