Cain1999397

Référence

Cain, M.L., Subler, S., Evans, J.P., Fortin, M.-J. (1999) Sampling spatial and temporal variation in soil nitrogen availability. Oecologia, 118(4):397-404. (Scopus )

Résumé

There are few studies in natural ecosystems on how spatial maps of soil attributes change within a growing season. In part, this is due to methodological difficulties associated with sampling the same spatial locations repeatedly over time. We describe the use of ion exchange membrane spikes, a relatively nondestructive way to measure how soil resources at a given point in space fluctuate over time. We used this method to examine spatial patterns of soil ammonium (NH4/+) and nitrate (NO3/-) availability in a mid-successional coastal dune for four periods of time during the growing season. For a single point in time, we also measured soil NH4/+ and NO3/- concentrations from soil cores collected from the mid-successional dune and from an early and a late successional dune. Soil nitrogen concentrations were low and highly variable in dunes of all ages. Mean NH4/+ and NO3/- concentrations increased with the age of the dune, whereas coefficients of variation for NH4/+ and NO3/- concentrations decreased with the age of the dune. Soil NO3/- concentration showed strong spatial structure, but soil NH4/+ concentration was not spatially structured. Plant-available NH4/+ and NO3/- showed relatively little spatial structure: only NO3/- availability in the second sampling period had significant patch structure. Spatial maps of NH4/+ and NO3/- availability changed greatly over time, and there were few significant correlations among soil nitrogen availability at different points in time. NO3/- availability in the second sampling period was highly correlated (r = 0.90) with the initial soil NO3/- concentrations, providing some evidence that patches of plant-available NO3/- may reappear at the same spatial locations at irregular points in time.

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@ARTICLE { Cain1999397,
    AUTHOR = { Cain, M.L. and Subler, S. and Evans, J.P. and Fortin, M.-J. },
    TITLE = { Sampling spatial and temporal variation in soil nitrogen availability },
    JOURNAL = { Oecologia },
    YEAR = { 1999 },
    VOLUME = { 118 },
    NUMBER = { 4 },
    PAGES = { 397-404 },
    NOTE = { cited By 110 },
    ABSTRACT = { There are few studies in natural ecosystems on how spatial maps of soil attributes change within a growing season. In part, this is due to methodological difficulties associated with sampling the same spatial locations repeatedly over time. We describe the use of ion exchange membrane spikes, a relatively nondestructive way to measure how soil resources at a given point in space fluctuate over time. We used this method to examine spatial patterns of soil ammonium (NH4/+) and nitrate (NO3/-) availability in a mid-successional coastal dune for four periods of time during the growing season. For a single point in time, we also measured soil NH4/+ and NO3/- concentrations from soil cores collected from the mid-successional dune and from an early and a late successional dune. Soil nitrogen concentrations were low and highly variable in dunes of all ages. Mean NH4/+ and NO3/- concentrations increased with the age of the dune, whereas coefficients of variation for NH4/+ and NO3/- concentrations decreased with the age of the dune. Soil NO3/- concentration showed strong spatial structure, but soil NH4/+ concentration was not spatially structured. Plant-available NH4/+ and NO3/- showed relatively little spatial structure: only NO3/- availability in the second sampling period had significant patch structure. Spatial maps of NH4/+ and NO3/- availability changed greatly over time, and there were few significant correlations among soil nitrogen availability at different points in time. NO3/- availability in the second sampling period was highly correlated (r = 0.90) with the initial soil NO3/- concentrations, providing some evidence that patches of plant-available NO3/- may reappear at the same spatial locations at irregular points in time. },
    AFFILIATION = { Department of Biology, New Mexico State University, Las Cruces, NM 88003, United States; Ohio Stt. Univ. Soil Ecol. Lab., Columbus, OH 43210, United States; Department of Biology, University of the South, Sewanee, TN 37383, United States; Département de Biologie, Université de Sherbrooke, Sherbrooke, Qué. J1K 2R1, Canada },
    AUTHOR_KEYWORDS = { Coastal dune ecosystems Ion exchange membrane spikes; Soil nitrogen availability; Soil resource heterogeneity; Spatial statistics },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1007/s004420050741 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032953981&doi=10.1007%2fs004420050741&partnerID=40&md5=98cb63cf43d126adf275c82db9921456 },
}

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