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首页> 外文期刊>Marine ecology progress series >Warming temperatures alter the relative abundance and distribution of two co-occurring foundational seagrasses in Chesapeake Bay, USA
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Warming temperatures alter the relative abundance and distribution of two co-occurring foundational seagrasses in Chesapeake Bay, USA

机译：变暖改变了美国切萨皮克湾两种同时存在的基础海草的相对丰度和分布

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Climate change has the potential to alter the abundance and distribution of coastal foundational species worldwide through range expansions. However, there is comparatively little evidence to show how climate change may alter interactions between foundational species that already co-occur. Here, we use long-term environmental monitoring data and non-parametric models to identify the factors driving the local cover of 2 co-existing foundational seagrasses, Zostera marina and Ruppia maritima, across 38 non-consecutive years in Chesapeake Bay, USA. We show, from an analysis of cover along permanent transects in the lower, polyhaline areas of the bay, an altered relationship between the abundance of these 2 species through time and space: mean cover on these transects of Z. marina was 47% in the 1990s, declined to 19% in the 2000s, and further declined to 17% in the 2010s, indicating a general decline of about 64% over the past 3 decades. In contrast, R. maritima cover was generally lower and less variable than Z. marina cover and increased from 6.8% in the 1990s to 7.5% in the 2000s and finally to 11.4% in the 2010s. Generalized additive models revealed that, after accounting for other environmental covariates, the cover of one species was strongly influenced by the cover of the other. The dominance of Z. marina over R. maritima was further modulated by rising temperatures. Thus, we propose that climate change may mediate the distributional patterns of these 2 species to the detriment of Z. marina and the benefit of R. maritima.
机译：气候变化有可能通过范围扩大来改变全球沿海基础物种的数量和分布。但是，很少有证据显示气候变化如何改变已经共存的基础物种之间的相互作用。在这里，我们使用长期的环境监测数据和非参数模型来确定在美国切萨皮克湾连续38年非连续的2年中，两个基础共存的基础海草Zostera marina和Ruppia maritima在当地被覆盖的因素。通过对海湾下部多卤区域永久性样带的覆盖率分析，我们发现这两个物种的丰富度之间存在时空关系的变化：Z。marina这些样带的平均覆盖率为47％。 1990年代，在2000年代下降到19％，在2010年代进一步下降到17％，表明在过去的30年中总体下降了约64％。相比之下，滨海罗勒的覆盖率通常低于滨海罗勒的覆盖率，并且变化较小，从1990年代的6.8％增加到2000年代的7.5％，最后到2010年代的11.4％。广义加性模型显示，在考虑了其他环境协变量之后，一个物种的覆盖率受到另一物种的覆盖率的强烈影响。上升的温度进一步调节了滨海罗勒菌在海藻上的优势。因此，我们认为气候变化可能会介导这两个物种的分布方式，从而损害滨海伯氏菌和滨海罗氏菌的利益。

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