Abstract
Geostatistical techniques have gained widespread use in ecology and environmental science. Variograms are commonly used to describe and examine spatial autocorrelation, and kriging has become the method of choice for interpolating spatially-autocorrelated variables. To date, most applications of geostatistics have defined the separation between sample points using simple Euclidean distance. In heterogeneous environments, however, certain landscape features may act as absolute or semi-permeable barriers. This effective separation may be more accurately described by a measure of distance that accounts for the presence of barriers. Here we present an approach to geostatistics based on a lowest-cost path (LCP) function, in which the cost of a path is a function of both the distance and the type of terrain crossed. The modified technique is applied to 13 years of survey data on blue crab abundance in Chesapeake Bay. Use of this landscape-based distance metric significantly changed estimates of all three variogram parameters. In this case study, although local differences in kriging predictions were apparent, the use of the landscape-based distance metric did not result in consistent improvements in kriging accuracy.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 605-621 |
| Number of pages | 17 |
| Journal | Environmetrics |
| Volume | 17 |
| Issue number | 6 |
| DOIs | |
| State | Published - Sep 1 2006 |
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All Science Journal Classification (ASJC) codes
- Statistics and Probability
- Ecological Modeling
Keywords
- Barriers
- Blue crab
- Chesapeake Bay
- Distance metric
- Kriging
- Variogram
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Landscape-based geostatistics : A case study of the distribution of blue crab in Chesapeake Bay. / Jensen, Olaf P.; Christman, Mary C.; Miller, Thomas J.
In: Environmetrics, Vol. 17, No. 6, 01.09.2006, p. 605-621.Research output: Contribution to journal › Article
TY - JOUR
T1 - Landscape-based geostatistics
T2 - A case study of the distribution of blue crab in Chesapeake Bay
AU - Jensen, Olaf P.
AU - Christman, Mary C.
AU - Miller, Thomas J.
PY - 2006/9/1
Y1 - 2006/9/1
N2 - Geostatistical techniques have gained widespread use in ecology and environmental science. Variograms are commonly used to describe and examine spatial autocorrelation, and kriging has become the method of choice for interpolating spatially-autocorrelated variables. To date, most applications of geostatistics have defined the separation between sample points using simple Euclidean distance. In heterogeneous environments, however, certain landscape features may act as absolute or semi-permeable barriers. This effective separation may be more accurately described by a measure of distance that accounts for the presence of barriers. Here we present an approach to geostatistics based on a lowest-cost path (LCP) function, in which the cost of a path is a function of both the distance and the type of terrain crossed. The modified technique is applied to 13 years of survey data on blue crab abundance in Chesapeake Bay. Use of this landscape-based distance metric significantly changed estimates of all three variogram parameters. In this case study, although local differences in kriging predictions were apparent, the use of the landscape-based distance metric did not result in consistent improvements in kriging accuracy.
AB - Geostatistical techniques have gained widespread use in ecology and environmental science. Variograms are commonly used to describe and examine spatial autocorrelation, and kriging has become the method of choice for interpolating spatially-autocorrelated variables. To date, most applications of geostatistics have defined the separation between sample points using simple Euclidean distance. In heterogeneous environments, however, certain landscape features may act as absolute or semi-permeable barriers. This effective separation may be more accurately described by a measure of distance that accounts for the presence of barriers. Here we present an approach to geostatistics based on a lowest-cost path (LCP) function, in which the cost of a path is a function of both the distance and the type of terrain crossed. The modified technique is applied to 13 years of survey data on blue crab abundance in Chesapeake Bay. Use of this landscape-based distance metric significantly changed estimates of all three variogram parameters. In this case study, although local differences in kriging predictions were apparent, the use of the landscape-based distance metric did not result in consistent improvements in kriging accuracy.
KW - Barriers
KW - Blue crab
KW - Chesapeake Bay
KW - Distance metric
KW - Kriging
KW - Variogram
UR - http://www.scopus.com/inward/record.url?scp=33748618718&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33748618718&partnerID=8YFLogxK
U2 - 10.1002/env.767
DO - 10.1002/env.767
M3 - Article
AN - SCOPUS:33748618718
VL - 17
SP - 605
EP - 621
JO - Environmetrics
JF - Environmetrics
SN - 1180-4009
IS - 6
ER -