Plant community stability results from shifts in species assemblages following whole community transplants across climates
Plant community stability results from shifts in species assemblages following whole community transplants across climates
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植物群落稳定性是由于整个群落跨气候移植后物种组合的变化造成的
DOI：
10.1111/oik.06536
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发表时间：
2019
期刊：
影响因子：
3.4
通讯作者：
K. Tielbörger
中科院分区：
文献类型：
--
作者：
Sara Tomiolo;Mark C. Bilton;K. Tielbörger
气候变化将减少地中海东部地区的降水量，增加降雨量的变异性，植物群落的反应在很大程度上是不确定的。在这里，我们测试了旱地植物群落的短期反应，对比降雨制度使用土壤和种子库的相互移植。我们将三个一年生植物群落暴露在沿着陡峭的降雨梯度的非常不同的气候条件下。我们测试了气候与社区起源对社区反应和抵抗力的作用。与此同时，我们询问了起源特定的气候适应是否可以预测气候之间的成分变化。由于极度干旱，在最干旱的气候下，所有植物都没有达到成熟期。对于其余两个群落起源，每个群落中最适应干的物种在干燥气候中增加，湿适应物种在潮湿气候中增加。干旱社区的起源表现出大的组成变化，同时保持稳定的植物密度，生物量和物种丰富度在整个气候。相反，潮湿的社区表现出较小的组成变化，但生物量和丰富度的变化较大。这种物种丰富度对降雨量变化的响应可以维持群落结构的稳定性。这与种子休眠相结合，有能力延迟灭绝以应对气候变化。然而，从长远来看，极端干旱的发生可能会导致适应潮湿的物种的丧失。
Climate change will decrease precipitation and increase rainfall variability in eastern Mediterranean regions, with responses of plant communities largely uncertain. Here, we tested short‐term responses of dryland plant communities to contrasting rainfall regimes using reciprocal transplants of soil and seed banks. We exposed three annual plant communities to very different climatic conditions along a steep rainfall gradient. We tested for the role of climate versus community origin on community response and resistance. In parallel, we asked whether origin‐specific climatic adaptations predict compositional shifts across climates. Due to an extreme drought, all plants in the driest climate failed to reach maturity. For the remaining two community origins, the most dry‐adapted species in each community increased in dry climate and the wet‐adapted species increased in wet climate. Dry community origins showed large compositional shifts while maintaining stable plant density, biomass and species richness across climates. Conversely, wet communities showed smaller compositional shifts, but larger variation in biomass and richness. This asynchrony in species abundances in response to rainfall variability could maintain structural community stability. This, in combination with seed dormancy, has the ability to delay extinction in response to climate change. However, increasing occurrence of extreme droughts may, in the long‐term, lead to loss of wet‐adapted species.
影响因子：
1
作者：
Garcia-Camacho, Raul;Metz, Johannes;Tielboerger, Katja
通讯作者：
Tielboerger, Katja
影响因子：
16.6
作者：
Tielboerger, Katja;Bilton, Mark C.;Metz, Johannes;Kigel, Jaime;Holzapfel, Claus;Lebrija-Trejos, Edwin;Konsens, Irit;Parag, Hadas A.;Sternberg, Marcelo
通讯作者：
Sternberg, Marcelo
DOI：
10.1016/j.ppees.2016.02.006
发表时间：
2016-04-01
影响因子：
3.6
作者：
Bilton, Mark C.;Metz, Johannes;Tielboerger, Katja
通讯作者：
Tielboerger, Katja