| Abstract: | Ion concentrations were generally less variable within storms compared with net ion input data. Concentrations and net inputs of some ions were consistently less variable than others; for example, Ca2+, NO3-, and SO42- were less variable than NH4 + and K+. These patterns of variability were consistent in comparisons both within and among storms. The relatively low variability of NO3- and SO42- is probably due to dry deposition of these ions as anthropogenic pollutants, while the low variability of Ca2+ is the result of deposition in windblown soil particles. The high variability of NH4+ and K+ is probably the result of biological processes. Ammonium is strongly retained by the canopy, and K+ is readily leached from it. Retention by, and leaching from, the canopy can induce spatial variability as a result of spatial heterogeneity in the biota. Throughfall volume also displayed low variability within and among events, requiring an average of 11 collectors to estimate the mean within 10% at the 95% confidence level. -from Author |
| Genre: | Article |
| ProdID: | 70016537 |
| Citation Author: | Puckett, L. J. |
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| Citation End Page: | 1588 |
| Citation Issue: | 11 |
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| Citation Language: | English |
| Citation Larger Work Title: | Canadian Journal of Forest Research |
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| Citation Number Of Pages: | 8 |
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| Citation Search Results Text: | Spatial variability and collector requirements for sampling throughfall volume and chemistry under a mixed-hardwood canopy; 1991; Article; Journal; Canadian Journal of Forest Research; Puckett, L. J. |
| Citation Start Page: | 1581 |
| Citation Volume: | 21 |
| Citation Year: | 1991 |
| Type: | citation/reference |
| Text: | Spatial variability and collector requirements for sampling throughfall volume and chemistry under a mixed-hardwood canopy; 1991; Article; Journal; Canadian Journal of Forest Research; Puckett, L. J. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Tue, 1 Jan 1991 00:00 -0600 |
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