Landscape determinants of pelagic and benthic primary production in northern lakes.
Landscape determinants of pelagic and benthic primary production in northern lakes.
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DOI：
10.1111/gcb.16409
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发表时间：
2022-12
影响因子：
11.6
通讯作者：
中科院分区：
文献类型：
--
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全球变化通过影响流域特征和湖水生态地球化学，影响北方湖泊底栖和浮游生境的初级生产总值。然而，关键环境驱动因素的变化如何体现和影响总体（即，全球初级生产力（底栖+中上层）和总的全球初级生产力在以底栖份额（自养结构）表示的生境之间的分配尚不清楚。使用来自位于北极，亚北极和北部北方瑞典的26个浅水湖泊的数据集，我们研究了集水特性（空气温度，土地覆盖，水文）如何影响湖泊的物理化学和总GPP和自养结构的模式。我们发现，总GPP主要是光有限的，由于高溶解有机碳（DOC）浓度来自集水土壤针叶植被和湿地，这是进一步促进高集水径流。相比之下，自养结构主要涉及的相对大小的底栖生物栖息地，并可能修改CO2施肥在亚北极，导致显着更高的总GPP相对于其他生物群落。在整个北极和亚北极地区，DIC和CO2与DOC无关，表明无机碳的外部输入可以影响湖泊生产力模式独立于陆地DOC供应。通过比较，DOC和CO2相关的北方湖泊，这表明DOC矿化作为一个重要的CO2源，这些网站。我们的研究结果强调，GPP作为一种资源受到景观特性的调节，并且对大规模的全球变化（变暖，水文加剧，酸化恢复）敏感，这些变化促进了流域特征和水生物理化学的变化。我们的研究结果有助于预测全球变化对自养结构的影响，从而对水生消费者的群落结构和资源利用产生影响。考虑到全球变化在北方的相似性，我们的研究结果可能与全球北方湖泊有关。沿沿着彩色溶解有机碳（DOC;从左至右）梯度的浮游（浅绿色）和底栖（深绿色）初级生产总值（GPP）景观决定因素的可视化。这种DOC梯度是由瑞典北方的北极（高海拔）、亚北极（中海拔）和北方（低海拔）地区的海拔和气候变化驱动的。沿着这一梯度，湖泊变得更褐、更富营养、更暖、pH值更低（将DIC池从100改变为CO2），导致全球初级生产力从底栖驱动的系统转变为中上层驱动的系统。这些变化也支持了整个区域全球生产力总值和DOC之间的单峰关系。
Global change affects gross primary production (GPP) in benthic and pelagic habitats of northern lakes by influencing catchment characteristics and lake water biogeochemistry. However, how changes in key environmental drivers manifest and impact total (i.e., benthic + pelagic) GPP and the partitioning of total GPP between habitats represented by the benthic share (autotrophic structuring) is unclear. Using a dataset from 26 shallow lakes located across Arctic, subarctic, and boreal northern Sweden, we investigate how catchment properties (air temperature, land cover, hydrology) affect lake physico‐chemistry and patterns of total GPP and autotrophic structuring. We find that total GPP was mostly light limited, due to high dissolved organic carbon (DOC) concentrations originating from catchment soils with coniferous vegetation and wetlands, which is further promoted by high catchment runoff. In contrast, autotrophic structuring related mostly to the relative size of the benthic habitat, and was potentially modified by CO2 fertilization in the subarctic, resulting in significantly higher total GPP relative to the other biomes. Across Arctic and subarctic sites, DIC and CO2 were unrelated to DOC, indicating that external inputs of inorganic carbon can influence lake productivity patterns independent of terrestrial DOC supply. By comparison, DOC and CO2 were correlated across boreal lakes, suggesting that DOC mineralization acts as an important CO2 source for these sites. Our results underline that GPP as a resource is regulated by landscape properties, and is sensitive to large‐scale global changes (warming, hydrological intensification, recovery of acidification) that promote changes in catchment characteristics and aquatic physico‐chemistry. Our findings aid in predicting global change impacts on autotrophic structuring, and thus community structure and resource use of aquatic consumers in general. Given the similarities of global changes across the Northern hemisphere, our findings are likely relevant for northern lakes globally. Visualization of landscape determinants of pelagic (light green) and benthic (dark green) gross primary production (GPP) along a gradient in colored dissolved organic carbon (DOC; left to right). This DOC gradient is driven by changes in altitude and climate across Arctic (high altitude), subarctic (mid altitude), and boreal (low altitude) regions of northern Sweden. Along this gradient, lakes become browner, more nutrient rich, warmer, and lower in pH (modifying the DIC pool from to CO2), resulting in a shift from systems where GPP is benthic driven to those where it is pelagic driven. These changes also underpin a unimodal relationship between total GPP and DOC across the region.
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影响因子：
11.6
作者：
Grasset, Charlotte;Sobek, Sebastian;Tranvik, Lars J.
通讯作者：
Tranvik, Lars J.
跨瑞典流的多个溶解的无机碳的来源和水槽，重新聚焦了稳定的C同位素的镜头。
影响因子：
4.6
作者：
Campeau A;Wallin MB;Giesler R;Löfgren S;Mörth CM;Schiff S;Venkiteswaran JJ;Bishop K
通讯作者：
Bishop K
影响因子：
3.7
作者：
Borges AV;Morana C;Bouillon S;Servais P;Descy JP;Darchambeau F
通讯作者：
Darchambeau F
影响因子：
11.4
作者：
Bartosiewicz, Maciej;Laurion, Isabelle;Maranger, Roxane
通讯作者：
Maranger, Roxane
影响因子：
4.5
作者：
Brown, Terry-Rene;Lajeunesse, Marc J.;Scott, Kathleen M.
通讯作者：
Scott, Kathleen M.