Zobrazeno 1 - 10
of 35
pro vyhledávání: '"N. Scott Urquhart"'
Publikováno v:
Environmental Monitoring and Assessment. 121:571-596
Geostatistical models are typically based on symmetric straight-line distance, which fails to represent the spatial configuration, connectivity, directionality, and relative position of sites in a stream network. Freshwater ecologists have explored s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b633efc2bb2efc4540148d3df6d23fa
https://doi.org/10.1007/s10661-005-9156-7
https://doi.org/10.1007/s10661-005-9156-7
Autor:
James H. Kellogg, Jeffrey S. Kahl, Alan T. Herlihy, John L. Stoddard, Rona Birnbaum, Katherine E. Webster, Steven G. Paulsen, Richard Haeuber, Peter S. Murdoch, N. Scott Urquhart, Frank A. Deviney, Karen M. Roy, Charles T. Driscoll, William E. Sharpe, David R. DeWalle, James R. Webb
Publikováno v:
Environmental Science & Technology. 38:484A-490A
Regulatory measures have had a positive effect on acid content in many lakes and streams in the northern and eastern United States.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2d61693de12d9d8a9e10e0e7dffee4c
https://doi.org/10.1021/es040686l
https://doi.org/10.1021/es040686l
Publikováno v:
Freshwater Biology. 49:474-489
Summary 1. During late spring 1993–1995, the U.S. Environmental Protection Agency's Environmental Monitoring and Assessment Program (EMAP) sampled 490 wadeable streams in the mid-Atlantic Highlands (MAH) of the U.S. for a variety of physical, chemi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::093d0cb4b4c9481594ace34055514b71
https://doi.org/10.1111/j.1365-2427.2004.01197.x
https://doi.org/10.1111/j.1365-2427.2004.01197.x
Publikováno v:
Canadian Journal of Fisheries and Aquatic Sciences. 61:283-291
In the northwestern United States, there is considerable interest in the recovery of Pacific salmon (Oncorhynchus spp.) populations listed as threatened or endangered. A critical component of any salmon recovery effort is the improvement of stream ha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f942e92198544e8595cfc6be7c7c13b6
https://doi.org/10.1139/f03-157
https://doi.org/10.1139/f03-157
Autor:
Don L. Stevens, N. Scott Urquhart
Publikováno v:
Environmetrics. 11:13-41
In many environmental samples, the target population is distributed over space in a more or less continuous manner, e.g., the waters of a lake or the trees in a forest. Attributes of such a population can be conceptualized as a continuous function de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::63bc043a1f81f6b80d816677e1aff5ad
https://doi.org/10.1002/(sici)1099-095x(200001/02)11:1<13::aid-env379>3.0.co
https://doi.org/10.1002/(sici)1099-095x(200001/02)11:1<13::aid-env379>3.0.co
Publikováno v:
Environmental Monitoring and Assessment. 63:95-113
In 1993, the U.S. Environmental Protection Agency (EPA), as part of the Environmental Monitoring and Assessment Program (EMAP), initiated a sample survey of streams in the mid-Atlantic. A major objective of the survey was to quantify ecological condi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b41562d7edba046a21e6491e050c99d
https://doi.org/10.1023/a:1006482025347
https://doi.org/10.1023/a:1006482025347
Autor:
N. Scott Urquhart
Publikováno v:
Environmental and Ecological Statistics. 14:1-3
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64c7fe6e0bf4ac7df00d3c2ba532bb38
https://doi.org/10.1007/s10651-006-0003-y
https://doi.org/10.1007/s10651-006-0003-y
Publikováno v:
Ecological Applications. 8:246-257
The term trend describes the continuing directional change in the value of an indicator, generally upward or generally downward. Many policy questions concern trend across a number of sites, such as lakes in a region, rather than trend at a single si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b3f277947df9ef61352b0562664e9aa
https://doi.org/10.1890/1051-0761(1998)008[0246:mfprro]2.0.co
https://doi.org/10.1890/1051-0761(1998)008[0246:mfprro]2.0.co
Publikováno v:
Environmental and Ecological Statistics. 3:329-347
Suppose fish are to be sampled from a stream. A fisheries biologist might ask one of the following three questions: ‘How many fish do I need to catch in order to see all of the species?’, ‘How many fish do I need to catch in order to see all sp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb16107d9f610ea9beaed50bdccec8c8
https://doi.org/10.1007/bf00539370
https://doi.org/10.1007/bf00539370
Publikováno v:
Water Resources Research. 32:2529-2538
The Temporally Integrated Monitoring of Ecosystems (TIME) project utilizes a hybrid sampling approach to achieve its goal of assessing whether emissions controls, mandated by the Clean Air Act Amendments of 1990, have had their intended effect on lak
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5936a86984d6f24c9aef8af0f50f4c59
https://doi.org/10.1029/96wr00902
https://doi.org/10.1029/96wr00902