Negative effects of cattle on soil carbon and nutrient pools reversed by megaherbivores

Negative effects of cattle on soil carbon and nutrient pools reversed by megaherbivores
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大型食草动物逆转了牛对土壤碳和养分库的负面影响

DOI:
10.1038/s41893-020-0490-0
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发表时间:
2020
影响因子:
27.6
通讯作者:
Olde Venterink, Harry
Olde Venterink, Harry
中科院分区:
环境科学与生态学1区
文献类型:
--
作者:
Sitters, Judith;Kimuyu, Duncan M.;Young, Truman P.;Claeys, Philippe;Olde Venterink, Harry

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在许多非洲稀树草原,野生食草动物的数量正在下降,这与牲畜(主要是牛)的替代和大型食草动物的消失有关。虽然有些牲畜管理做法可能与保护原生稀树草原生物多样性相一致,但这些综合性野生食草动物/牲畜管理做法的可持续性尚不清楚。例如,这些食草动物的混合将如何影响热带草原生态系统长期运作的关键过程,如土壤碳、氮和磷库和循环?肯尼亚长期围封实验研究了在“黑棉”热带稀树草原中以中等密度操纵野生食草动物和牛的存在和不存在的生态系统后果。在这里,我们表明,20年后,牛的存在减少了土壤总碳和氮库,而大型食草动物(主要是大象)的存在增加了这些库,甚至扭转了牛的负面影响。我们的研究结果表明,在中等密度的牛和野生食草动物的混合可以是可持续的,只要野生食草动物的组合包括最大的物种。
Wild herbivore populations are declining in many African savannas, which is related to replacement by livestock (mainly cattle) and the loss of megaherbivores. Although some livestock management practices may be compatible with the conservation of native savanna biodiversity, the sustainability of these integrated wild herbivore/livestock management practices is unknown. For instance, how will these herbivore mixes influence key processes for the long-term functioning of savanna ecosystems, such as soil carbon, nitrogen and phosphorus pools and cycling? The Kenya Long-term Exclosure Experiment studies the ecosystem consequences of manipulating the presence and absence of wild herbivores and cattle at moderate densities in a ‘black cotton’ savanna. Here we show that after 20 years, cattle presence decreased total soil carbon and nitrogen pools, while the presence of megaherbivores (mainly elephants) increased these pools and even reversed the negative effects of cattle. Our results suggest that a mix of cattle at moderate densities and wild herbivores can be sustainable, provided that the assemblage of wild herbivores includes the largest species.
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DOI: --
发表时间: 1992
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DOI: --
发表时间: 2015
期刊: Biogeochemistry
影响因子: 4
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