Prevalence of phytoplankton limitation by both nitrogen and phosphorus related to nutrient stoichiometry, land use, and primary producer biomass across the northeastern United States

Prevalence of phytoplankton limitation by both nitrogen and phosphorus related to nutrient stoichiometry, land use, and primary producer biomass across the northeastern United States
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美国东北部与营养化学计量、土地利用和初级生产者生物量相关的氮和磷对浮游植物的限制的普遍性

DOI:
10.1080/20442041.2019.1664233
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发表时间:
2020
期刊:
影响因子:
3.1
通讯作者:
Taylor, Alex E.
Taylor, Alex E.
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Lewis, Abigail S.;Kim, Brian S.;Edwards, Hailee L.;Wander, Heather L.;Garfield, Claire M.;Murphy, Heather E.;Poulin, Noah D.;Princiotta, Sarah D.;Rose, Kevin C.;Taylor, Alex E.

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淡水浮游植物生产力的限制性营养物质在地理区域内和地理区域之间可能有所不同。了解本地(即,湖泊和集水区)和区域(即,多流域)因素改变了氮(N)和磷(P)限制的相对重要性,这对淡水生态系统提出了一个关键的研究挑战,并可能提高我们对如何管理湖泊以控制富营养化的理解。在这里,我们使用在原位微宇宙孵化因子N和P的修正案,以确定在美国东北部的16个湖泊的限制类型。研究湖泊有相似的气候,但不同的地理,营养状态和化学。N和P限制最常见(共限制n = 5和连续限制n = 3),但我们也观察到单一营养N(n= 3)和P限制(n= 4)。限制的类型与背景浮游植物生物量,经度和土地利用。响应的幅度相结合的养分富集背景P浓度呈负相关。这个多湖的实验表明,氮和磷往往在调节生产力的作用,当地和区域的特点影响养分限制模式。
The limiting nutrient for freshwater phytoplankton productivity can vary within and between geographic regions. Understanding how local (i.e., lake and catchment) and regional (i.e., multiple catchment) factors shift the relative importance of nitrogen (N) and phosphorus (P) limitation presents a key research challenge for freshwater ecosystems and may enhance our understanding of how lakes could be managed to control eutrophication. Here, we used in situ microcosm incubations with factorial N and P amendments to determine the type of limitation in 16 lakes across the northeastern United States. Study lakes had similar climate but varied in geography, trophic status, and chemistry. Limitation by both N and P was most common (colimitationn= 5 and serial limitationn= 3); however, we also observed single nutrient N (n= 3) and P limitation (n= 4). The type of limitation was related to background phytoplankton biomass, longitude, and land use. The magnitude of response to combined nutrient enrichment was negatively related to background P concentrations. This multi-lake experiment suggests that both N and P often play a role in regulating productivity and that local and regional characteristics affect nutrient limitation patterns.
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