Reducing dispersal limitation via seed addition increases species richness but not above-ground biomass.,Ecology Letters

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Reducing dispersal limitation via seed addition increases species richness but not above-ground biomass.
Ecology Letters ( IF 7.6 ) Pub Date : 2020-06-21 , DOI: 10.1111/ele.13566
Emma Ladouceur _{1,

2,

3} , W Stanley Harpole _{1,

3,

4} , Shane A Blowes _{1,

2} , Christiane Roscher _{1,

3} , Harald Auge _{1,

5} , Eric W Seabloom ₆ , Jonathan M Chase _{1,

2}

Affiliation

Seed dispersal limitation, which can be exacerbated by a number of anthropogenic causes, can result in local communities having fewer species than they might potentially support, representing a potential diversity deficit. The link between processes that shape natural variation in diversity, such as dispersal limitation, and the consequent effects on productivity is less well known. Here, we synthesised data from 12 seed addition experiments in grassland communities to examine the influence of reducing seed dispersal limitation (from 1 to 60 species added across experiments) on species richness and productivity. For every 10 species of seed added, we found that species richness increased by about two species. However, the increase in species richness by overcoming seed limitation did not lead to a concomitant increase in above‐ground biomass production. This highlights the need to consider the relationship between biodiversity and ecosystem functioning in a pluralistic way that considers both the processes that shape diversity and productivity simultaneously in naturally assembled communities.

中文翻译：

通过添加种子减少扩散限制，可以增加物种丰富度，但不能增加地上生物量。

种子散布的局限性可能由于许多人为原因而加剧，可能导致当地社区的物种数量少于其可能支持的物种，这表示潜在的多样性不足。形成多样性自然变化（例如分散限制）的过程之间的联系以及由此产生的对生产率的影响鲜为人知。在这里，我们合成了来自草地社区的12个种子添加实验的数据，以检验减少种子传播限制（整个实验中添加1至60种）对物种丰富度和生产力的影响。我们发现，每添加10种种子，物种丰富度就会增加大约两种。然而，通过克服种子限制而增加的物种丰富度并未导致地上生物量产量的随之增加。这突出了需要以多元化的方式考虑生物多样性与生态系统功能之间的关系，这种方式要同时考虑在自然聚集的社区中同时塑造多样性和生产力的过程。

更新日期：2020-06-21

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