Greening of the boreal peatland food web: Periphyton supports secondary production in northern peatlands
Greening of the boreal peatland food web: Periphyton supports secondary production in northern peatlands
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北方泥炭地食物网的绿化：附生植物支持北部泥炭地的二次生产
DOI：
10.1002/lno.11719
复制
发表时间：
2021
影响因子：
4.5
通讯作者：
Rober, Allison R.
中科院分区：
文献类型：
--
作者：
Ferguson, Hannah M.;Slagle, Elizabeth J.;McCann, Ann Ashlea;Walls, Jeremy T.;Wyatt, Kevin H.;Rober, Allison R.
表征食物网动态的时空变异性对于预测气候变化所预期的更湿润和更富营养的条件将如何影响北部泥炭地有机质的命运是必要的。本研究的目标是：(1)利用同位素分析（13C和15n）记录周围植物对泥炭地食物网贡献的时空变化；(2)量化北部寒带生物群落中常见的丰富、中等和贫瘠泥炭地梯度中养分有效性增加对初级和次级生产的影响。我们在位于阿拉斯加内陆的每个沼泽中建立了可复制样地，以量化整个生长季节（5 - 8月）有无营养添加的周围植物（藻类和细菌）和大型无脊椎动物生物量。稳定同位素分析表明，随着时间的推移，浮游植物为食物网贡献了65%的有机物，而来自植物或碎屑的有机物只占7%。随着时间的推移，所有沼泽区藻类生物量增加，食草动物生物量增加，反映了基础资源的转移，随后在生长季节的后半段，食肉大型无脊椎动物增加。此外，营养物的添加也提高了周边植物和大型无脊椎动物生物量的各项指标。这些数据提供了对北方泥炭地水生食物网自然变化模式的深入了解，并表明该生态系统中的基础资源通常被认为是“以碎屑为基础的”，实际上是由周围植物驱动的，植物碎屑途径的输入最小。
Characterizing spatial and temporal variability of food web dynamics is necessary to predict how wetter and more nutrient‐rich conditions expected with climate change will influence the fate of organic matter within northern peatlands. The goals of this study were to (1) document spatial and temporal variability in the contribution of periphyton to peatland food webs using isotope analysis (13C and15N), and (2) quantify the influence of increased nutrient availability on primary and secondary production across a gradient of rich, moderate, and poor fen peatlands common to the northern boreal biome. We established replicatem2plots within each fen located in interior Alaska to quantify periphyton (algae and bacteria) and macroinvertebrate biomass with and without nutrient addition throughout a growing season (May–August). Stable isotope analysis showed that periphyton contributed = 65% of organic matter to the food web over time and across fens compared to = 7% from plants or detritus. The transfer of basal resources was reflected in an increase in herbivore biomass as algal biomass increased over time in all fens, followed by an increase in predatory macroinvertebrates during the latter part of the growing season. Furthermore, all measures of periphyton and macroinvertebrate biomass were enhanced by nutrient addition. These data provide insight into patterns of natural variation within the aquatic food web of boreal peatlands and show that basal resources within this ecosystem, which are generally considered to be “detritus‐based,” are actually driven by periphyton with minimal input from plant detrital pathways.
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甲烷作为高位沼泽池中食物网的碳源
影响因子：
1.8
作者：
G. A. V. Duinen;K. Vermonden;P. Bodelier;A. Hendriks;R. Leuven;J. Middelburg;G. V. D. Velde;G. V. D. Velde;W. Verberk
通讯作者：
W. Verberk
阿拉斯加北方沼泽中藻类群落对水文实验和年际变化的响应
影响因子：
1.8
作者：
A. Rober;Kevin H. Wyatt;M. Turetsky;R. Stevenson
通讯作者：
R. Stevenson
底栖垫为苔原池塘食物网中的远洋消费者提供潜在的补贴
DOI：
--
发表时间：
2014
期刊：
影响因子：
--
作者：
H. Mariash;Shawn P. Devlin;L. Forsström;Roger I. Jones;M. Rautio
通讯作者：
M. Rautio
影响因子：
11.6
作者：
McPartland, Mara Y.;Kane, Evan S.;Montgomery, Rebecca A.
通讯作者：
Montgomery, Rebecca A.
附生植物对高腐殖质北方湖泊沿岸二次生产的支持
影响因子：
1.8
作者：
Jussi Vesterinen;J. Syväranta;Shawn P. Devlin;Roger I. Jones
通讯作者：
Roger I. Jones