Phillip van Mantgem
Phil van Mantgem is a research ecologist at the Western Ecological Research Center.
RESEARCH INTERESTS
- Conservation biology
- Fire ecology
- Forest ecology
Professional Experience
Research Ecologist, USGS, Redwood Field Station, Arcata, CA, 2008 - Present
Ecologist, USGS, Sequoia and Kings Canyon Field Station, Three Rivers, CA, 2000 - 2008
Education and Certifications
Ph.D., Ecology, University of California, Davis, CA 2001
M.S., Plant Biology, University of California, Davis, CA 1996
B.S., Botany, University of Iowa, Iowa City, IA 1991
Science and Products
Filter Total Items: 16
No Result Found
Filter Total Items: 78
Forest turnover rates follow global and regional patterns of productivity Forest turnover rates follow global and regional patterns of productivity
Using a global database, we found that forest turnover rates (the average of tree mortality and recruitment rates) parallel broad-scale patterns of net primary productivity. First, forest turnover was higher in tropical than in temperate forests. Second, as recently demonstrated by others, Amazonian forest turnover was higher on fertile than infertile soils. Third, within temperate...
Authors
N.L. Stephenson, P. J. van Mantgem
The accuracy of matrix population model projections for coniferous trees in the Sierra Nevada, California The accuracy of matrix population model projections for coniferous trees in the Sierra Nevada, California
1 We assess the use of simple, size-based matrix population models for projecting population trends for six coniferous tree species in the Sierra Nevada, California. We used demographic data from 16 673 trees in 15 permanent plots to create 17 separate time-invariant, density-independent population projection models, and determined differences between trends projected from initial...
Authors
Phillip J. van Mantgem, Nathan L. Stephenson
Effects of an introduced pathogen and fire exclusion on the demography of sugar pine Effects of an introduced pathogen and fire exclusion on the demography of sugar pine
An introduced pathogen, white pine blister rust (Cronartium ribicola), has caused declines in five-needled pines throughout North America. Simultaneously, fire exclusion has resulted in dense stands in many forest types, which may create additional stress for these generally shade-intolerant pines. Fire exclusion also allows fuels to accumulate, and it is unclear how affected populations...
Authors
Phillip J. van Mantgem, Nathan L. Stephenson, MaryBeth Keifer, Jon E. Keeley
An experimental demonstration of stem damage as a predictor of fire-caused mortality for ponderosa pine An experimental demonstration of stem damage as a predictor of fire-caused mortality for ponderosa pine
We subjected 159 small ponderosa pine (Pinus ponderosa Dougl. ex P. & C. Laws.) to treatments designed to test the relative importance of stem damage as a predictor of postfire mortality. The treatments consisted of a group with the basal bark artificially thinned, a second group with fuels removed from the base of the stem, and an untreated control. Following prescribed burning, crown...
Authors
P. van Mantgem, M. Schwartz
Does coring contribute to tree mortality? Does coring contribute to tree mortality?
We assess the potential of increment coring, a common method for measuring tree ages and growth, to contribute to mortality. We used up to 21 years of annual censuses from two cored and two uncored permanent plots in the Sierra Nevada of California, to detect changes in mortality rates 12 years following coring for individuals >5 cm DBH from two coniferous species, Abies concolor (Gordon...
Authors
P. J. van Mantgem, N.L. Stephenson
Bark heat resistance of small trees in Californian mixed conifer forests: Testing some model assumptions Bark heat resistance of small trees in Californian mixed conifer forests: Testing some model assumptions
An essential component to models of fire-caused tree mortality is an assessment of cambial damage. Cambial heat resistance has been traditionally measured in large overstory trees with thick bark, although small trees have thinner bark and thus are more sensitive to fire. We undertook this study to determine if current models of bark heat transfer are applicable to small trees (
Authors
Phillip J. van Mantgem, Mark Schwartz
Science and Products
Filter Total Items: 16
No Result Found
Filter Total Items: 78
Forest turnover rates follow global and regional patterns of productivity Forest turnover rates follow global and regional patterns of productivity
Using a global database, we found that forest turnover rates (the average of tree mortality and recruitment rates) parallel broad-scale patterns of net primary productivity. First, forest turnover was higher in tropical than in temperate forests. Second, as recently demonstrated by others, Amazonian forest turnover was higher on fertile than infertile soils. Third, within temperate...
Authors
N.L. Stephenson, P. J. van Mantgem
The accuracy of matrix population model projections for coniferous trees in the Sierra Nevada, California The accuracy of matrix population model projections for coniferous trees in the Sierra Nevada, California
1 We assess the use of simple, size-based matrix population models for projecting population trends for six coniferous tree species in the Sierra Nevada, California. We used demographic data from 16 673 trees in 15 permanent plots to create 17 separate time-invariant, density-independent population projection models, and determined differences between trends projected from initial...
Authors
Phillip J. van Mantgem, Nathan L. Stephenson
Effects of an introduced pathogen and fire exclusion on the demography of sugar pine Effects of an introduced pathogen and fire exclusion on the demography of sugar pine
An introduced pathogen, white pine blister rust (Cronartium ribicola), has caused declines in five-needled pines throughout North America. Simultaneously, fire exclusion has resulted in dense stands in many forest types, which may create additional stress for these generally shade-intolerant pines. Fire exclusion also allows fuels to accumulate, and it is unclear how affected populations...
Authors
Phillip J. van Mantgem, Nathan L. Stephenson, MaryBeth Keifer, Jon E. Keeley
An experimental demonstration of stem damage as a predictor of fire-caused mortality for ponderosa pine An experimental demonstration of stem damage as a predictor of fire-caused mortality for ponderosa pine
We subjected 159 small ponderosa pine (Pinus ponderosa Dougl. ex P. & C. Laws.) to treatments designed to test the relative importance of stem damage as a predictor of postfire mortality. The treatments consisted of a group with the basal bark artificially thinned, a second group with fuels removed from the base of the stem, and an untreated control. Following prescribed burning, crown...
Authors
P. van Mantgem, M. Schwartz
Does coring contribute to tree mortality? Does coring contribute to tree mortality?
We assess the potential of increment coring, a common method for measuring tree ages and growth, to contribute to mortality. We used up to 21 years of annual censuses from two cored and two uncored permanent plots in the Sierra Nevada of California, to detect changes in mortality rates 12 years following coring for individuals >5 cm DBH from two coniferous species, Abies concolor (Gordon...
Authors
P. J. van Mantgem, N.L. Stephenson
Bark heat resistance of small trees in Californian mixed conifer forests: Testing some model assumptions Bark heat resistance of small trees in Californian mixed conifer forests: Testing some model assumptions
An essential component to models of fire-caused tree mortality is an assessment of cambial damage. Cambial heat resistance has been traditionally measured in large overstory trees with thick bark, although small trees have thinner bark and thus are more sensitive to fire. We undertook this study to determine if current models of bark heat transfer are applicable to small trees (
Authors
Phillip J. van Mantgem, Mark Schwartz