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Throughfall enrichment and stream nutrient chemistry in small headwater catchments with different land cover in southern Chile

(2016) HYDROLOGICAL PROCESSES. 30(26). p.4944-4955
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Abstract
Land cover changes have a great impact on nitrogen (N) and phosphorous (P) fluxes catchments. In this study, we wanted to compare different land covers: deciduous (D), evergreen (E) (both native forests), and exotic Eucalyptus globulus plantation (EP), affected precipitation, and stream discharge on N and P species concentrations and fluxes, under a low deposition climate in south‐central Chile. For this, we collected bulk precipitation, throughfall, and stream water samples after 41 rainfall events in E and EP, during the period June 2009–March 2011, and 31 rainfall events in D, during the period October 2009–March 2011. The highest canopy enrichment of N and P species for throughfall was observed in deciduous forest, while E. globulus showed the minimum enrichment. Total nitrogen (total‐N) discharge in EP was about 8.6 times higher than that of E and D catchments. Total‐N annual retention was positive only in E and D catchments. However, EP catchment showed a net loss (−4.79 kg N ha/year). The biggest difference was observed in nitrate stream concentrations, which showed low values for E (3.4 ± 1.3 μg/L), while EP and D showed higher nitrate concentrations (84.9 ± 16.7 and 134.7 ± 36.7 μg/L, for EP and D, respectively). Total phosphorous (total‐P) discharge flux was low in EP (0.4 kg P ha/year), and negligible in E and D forests (<0.1 kg P ha/year). Total‐P annual retention was near to 1.0 kg N ha/year (on E and D), while a net loss (−1.5 kg N ha/year) was observed for EP. We attribute the observed differences in nutrient throughfall enrichment due to high multi‐stratified canopies in the native forests. Both deciduous and evergreen native forest‐covered catchments showed the highest retention of total‐N and total‐P, in contrast to Eucalyptus‐covered plantation.
Keywords
Eucalyptus globulus, evergreen forest, Nothofagus obliqua, nutrient fluxes, southern Chile, EXOTIC PLANTATIONS, FOREST ECOSYSTEMS, RAIN-FOREST, NITROGEN, WATER, RETENTION, MECHANISMS, FLUXES, EUTROPHICATION, LANDSCAPE

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Chicago
Hervé Fernández, Pedro Alejandro, Carlos E Oyarzún, and Stefan Woelfl. 2016. “Throughfall Enrichment and Stream Nutrient Chemistry in Small Headwater Catchments with Different Land Cover in Southern Chile.” Hydrological Processes 30 (26): 4944–4955.
APA
Hervé Fernández, P. A., Oyarzún, C. E., & Woelfl, S. (2016). Throughfall enrichment and stream nutrient chemistry in small headwater catchments with different land cover in southern Chile. HYDROLOGICAL PROCESSES, 30(26), 4944–4955.
Vancouver
1.
Hervé Fernández PA, Oyarzún CE, Woelfl S. Throughfall enrichment and stream nutrient chemistry in small headwater catchments with different land cover in southern Chile. HYDROLOGICAL PROCESSES. 2016;30(26):4944–55.
MLA
Hervé Fernández, Pedro Alejandro, Carlos E Oyarzún, and Stefan Woelfl. “Throughfall Enrichment and Stream Nutrient Chemistry in Small Headwater Catchments with Different Land Cover in Southern Chile.” HYDROLOGICAL PROCESSES 30.26 (2016): 4944–4955. Print.
@article{8521193,
  abstract     = {Land cover changes have a great impact on nitrogen (N) and phosphorous (P) fluxes catchments. In this study, we wanted to compare different land covers: deciduous (D), evergreen (E) (both native forests), and exotic Eucalyptus globulus plantation (EP), affected precipitation, and stream discharge on N and P species concentrations and fluxes, under a low deposition climate in south‐central Chile. For this, we collected bulk precipitation, throughfall, and stream water samples after 41 rainfall events in E and EP, during the period June 2009–March 2011, and 31 rainfall events in D, during the period October 2009–March 2011. The highest canopy enrichment of N and P species for throughfall was observed in deciduous forest, while E. globulus showed the minimum enrichment. Total nitrogen (total‐N) discharge in EP was about 8.6 times higher than that of E and D catchments. Total‐N annual retention was positive only in E and D catchments. However, EP catchment showed a net loss (−4.79 kg N ha/year). The biggest difference was observed in nitrate stream concentrations, which showed low values for E (3.4 ± 1.3 μg/L), while EP and D showed higher nitrate concentrations (84.9 ± 16.7 and 134.7 ± 36.7 μg/L, for EP and D, respectively). Total phosphorous (total‐P) discharge flux was low in EP (0.4 kg P ha/year), and negligible in E and D forests (<0.1 kg P ha/year). Total‐P annual retention was near to 1.0 kg N ha/year (on E and D), while a net loss (−1.5 kg N ha/year) was observed for EP. We attribute the observed differences in nutrient throughfall enrichment due to high multi‐stratified canopies in the native forests. Both deciduous and evergreen native forest‐covered catchments showed the highest retention of total‐N and total‐P, in contrast to Eucalyptus‐covered plantation.},
  author       = {Hervé Fernández, Pedro Alejandro and Oyarzún, Carlos E and Woelfl, Stefan},
  issn         = {0885-6087},
  journal      = {HYDROLOGICAL PROCESSES},
  keywords     = {Eucalyptus globulus,evergreen forest,Nothofagus obliqua,nutrient fluxes,southern Chile,EXOTIC PLANTATIONS,FOREST ECOSYSTEMS,RAIN-FOREST,NITROGEN,WATER,RETENTION,MECHANISMS,FLUXES,EUTROPHICATION,LANDSCAPE},
  language     = {eng},
  number       = {26},
  pages        = {4944--4955},
  title        = {Throughfall enrichment and stream nutrient chemistry in small headwater catchments with different land cover in southern Chile},
  url          = {http://dx.doi.org/10.1002/hyp.11001},
  volume       = {30},
  year         = {2016},
}

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