Goose Feces Effects on Subarctic Soil Nitrogen Availability and Greenhouse Gas Fluxes
Goose Feces Effects on Subarctic Soil Nitrogen Availability and Greenhouse Gas Fluxes
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鹅粪便对亚北极土壤氮素有效性和温室气体通量的影响
DOI：
10.1007/s10021-022-00752-x
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发表时间：
2022
期刊：
影响因子：
3.7
通讯作者：
Leffler, A. Joshua
中科院分区：
文献类型：
--
作者：
Beard, Karen H.;Kelsey, Katharine C.;Choi, Ryan T.;Welker, Jeffrey M.;Leffler, A. Joshua
食草脊椎动物的排泄物被认为会影响营养循环、植物营养和生长;然而，它的重要性很少与食草动物的其他方面（如践踏和落叶）分开，这就留下了关于食草动物排泄物影响的程度的问题。我们假设，作为额外的营养源，粪便将直接增加土壤N浓度和N2 O排放，减轻植物和微生物的养分限制，从而增加植物生长和叶片质量，并增加CH 4排放。我们在美国阿拉斯加州西部沿海地区进行了一项实地实验，对这些假设进行了测试。在该实验中，我们对鹅粪便进行了处理，使自然放牧区接受了三种处理：粪便清除、环境量的粪便或双倍环境量的粪便。加倍的粪便略微增加了土壤水中的NH 4 +-N，而加倍的粪便和粪便去除都显着增加了NO3−-N;去除小区的N2 O通量也较高。粪便去除轻微降低根生物量和显着降低生产力（即GPP）在第二年，测量为更大的CO2排放量。加倍粪便通过增加%N和降低C：N略微提高了叶片化学品质。处理对CH 4通量没有影响。简而言之，粪便清除产生的网站贫营养，减少根系生长，禾本科营养吸收，和生产力。虽然鹅粪便本身并没有在阿拉斯加西部的营养循环中产生巨大的变化，但它们似乎是放牧地区营养物质的重要来源，并有助于温室气体交换，因为它们的去除增加了CO2和N2 O的排放。
Vertebrate herbivore excrement is thought to influence nutrient cycling, plant nutrition, and growth; however, its importance is rarely isolated from other aspects of herbivory, such as trampling and leaf removal, leaving questions about the extent to which herbivore effects are due to feces. We hypothesized that as a source of additional nutrients, feces would directly increase soil N concentrations and N2O emission, alleviate plant, and microbial nutrient limitations, resulting in increased plant growth and foliar quality, and increase CH4emissions. We tested these hypotheses using a field experiment in coastal western Alaska, USA, where we manipulated goose feces such that naturally grazed areas received three treatments: feces removal, ambient amounts of feces, or double ambient amounts of feces. Doubling feces marginally increased NH4+-N in soil water, whereas both doubled feces and feces removal significantly increased NO3−-N; N2O flux was also higher in removal plots. Feces removal marginally reduced root biomass and significantly reduced productivity (that is, GPP) in the second year, measured as greater CO2emissions. Doubling feces marginally increased foliar chemical quality by increasing %N and decreasing C:N. Treatments did not influence CH4flux. In short, feces removal created sites poorer in nutrients, with reduced root growth, graminoid nutrient uptake, and productivity. While goose feces alone did not create dramatic changes in nutrient cycling in western Alaska, they do appear to be an important source of nutrients for grazed areas and to contribute to greenhouse gas exchange as their removal increased emissions of CO2and N2O to the atmosphere.
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影响因子：
3.7
作者：
Barthelemy, Helene;Stark, Sari;Olofsson, Johan
通讯作者：
Olofsson, Johan
美国阿拉斯加育空-库斯科奎姆三角洲多空间尺度生态系统的层次组织
DOI：
--
发表时间：
2000
期刊：
影响因子：
--
作者：
M. Jorgenson
通讯作者：
M. Jorgenson
阿拉斯加西部沿海地区，鹅的提前到来比春天的到来更能提高土壤氮素的利用率
影响因子：
3.7
作者：
Choi, Ryan T.;Beard, Karen H.;Kelsey, Katharine C.;Leffler, A. Joshua;Schmutz, Joel A.;Welker, Jeffrey M.
通讯作者：
Welker, Jeffrey M.
影响因子：
3.1
作者：
Dessborn, Lisa;Hessel, Rebecca;Elmberg, Johan
通讯作者：
Elmberg, Johan
北极淡水池塘中鹅介导的营养富集和浮游食草动物控制
影响因子：
2.7
作者：
G. V. van Geest;D. Hessen;P. Spierenburg;G. Dahl;G. Christensen;P. J. Faerøvig;M. Brehm;M. Loonen;E. van Donk
通讯作者：
E. van Donk