Effects of macroalgal species identity and richness on primary production in benthic marine communities
Effects of macroalgal species identity and richness on primary production in benthic marine communities
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DOI：
10.1111/j.1461-0248.2005.00823.x
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发表时间：
2005-11-01
期刊：
影响因子：
8.8
通讯作者：
Kertesz, JS
中科院分区：
文献类型：
--
作者：
Bruno, JF;Boyer, KE;Kertesz, JS
植物生物多样性可以促进陆地生态系统的初级生产，但生物多样性对海洋生态系统的影响在很大程度上尚未得到研究。在美国北卡罗莱纳州的潮下硬基质群落中，我们进行了一系列的野外和中生态实验，以测量大藻的同一性和丰富度对初级生产力（净光合速率）和生物量积累的相对影响。藻类特性持续且强烈地影响生产；物种丰富度效应虽然显著，但很微妙。净生物多样性效应的划分表明，互补效应总是积极的，混合栽培的物种通常比单一栽培的物种更多产。令人惊讶的是，在最多样化的处理中，生长缓慢的物种比产量最高的物种表现得相对更好，因此选择效应始终是负的。我们的研究结果表明，陆地植物生物多样性效应的几个基本机制也在以藻类为基础的海洋生态系统中起作用，因此可能是普遍的。
Plant biodiversity can enhance primary production in terrestrial ecosystems, but biodiversity effects are largely unstudied in the ocean. We conducted a series of field and mesocosm experiments to measure the relative effects of macroalgal identity and richness on primary productivity (net photosynthetic rate) and biomass accumulation in hard substratum subtidal communities in North Carolina, USA. Algal identity consistently and strongly affected production; species richness effects, although often significent, were subtle. Partitioning of the net biodiversity effect indicated that complementarity effects were always positive and species were usually more productive in mixtures than in monoculture. Surprisingly, slow growing species performed relatively better in the most diverse treatments than the most productive species, thus selection effects were consistently negative. Our results suggest that several basic mechanisms underlying terrestrial plant biodiversity effects also operate in algal-based marine ecosystems, and thus may be general.