Linking carbon and nitrogen spiraling in streams
Linking carbon and nitrogen spiraling in streams
复制标题
连接溪流中螺旋状的碳和氮
DOI:
10.1086/707810
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发表时间:
2020
影响因子:
1.8
通讯作者:
Hotchkiss, Erin R.
中科院分区:
文献类型:
--
作者:
Plont, Stephen;O’Donnell, Brynn M.;Gallagher, Morgan T.;Hotchkiss, Erin R.
Anthropogenic activities have altered biogeochemical cycles and the fate of organic carbon (OC) and nutrients in freshwater ecosystems. To investigate coupled OC and nutrient cycling and fate in streams, we compared the spiraling lengths (S) and uptake velocities (vf) of OC and nitrate (NO3−) in headwater streams (n= 72) across different land uses (i.e., agricultural, urban, natively vegetated) and regions (n= 8) in the United States. We did these comparisons with data collected for the second Lotic Intersite Nitrogen eXperiment (LINX II; Mulholland et al. 2009). OC spiraling lengths (SOC) in reference (21–4180 m) were shorter than in agricultural streams (89–37,156 m) and urban streams (104–12,605 m). OC mineralization velocities (vf−OC) and NO3−uptake velocities (vf−NO3) were weakly positively correlated across all sites (r= 0.33,p= 0.008). The strongest correlations between OC mineralization and NO3−uptake were in streams with gross primary production (GPP) similar to ecosystem respiration (ER) and human-altered streams (all agricultural streams:r= 0.56,p= 0.008, GPP∶ER = 0.6; all urban streams:r= 0.73,p< 0.001, GPP∶ER = 0.5). Additionally, the distances traveled by OC and NO3−before they were permanently removed from the stream by mineralization (SOC) or denitrification (Sw–den) were similar in magnitude, althoughSOCwas shorter thanSw–denin most streams. This study demonstrates how OC and NO3−spiraling can be used to investigate how region and land use influence coupled OC-NO3−interactions and fate.
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影响因子:
5.2
作者:
A. Wymore;A. A. Coble-A.;B. Rodríguez‐Cardona;W. McDowell
通讯作者:
A. Wymore;A. A. Coble-A.;B. Rodríguez‐Cardona;W. McDowell
影响因子:
1.4
作者:
R. Hall;J. Beaulieu
通讯作者:
J. Beaulieu
影响因子:
5
作者:
Griffiths, Natalie A.;Tank, Jennifer L.;Evans-White, Michelle A.
通讯作者:
Evans-White, Michelle A.
影响因子:
5.4
作者:
L. Snyder;J. Potter;W. McDowell
通讯作者:
W. McDowell
影响因子:
4.5
作者:
L. Larsen;J. Harvey
通讯作者:
J. Harvey