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Anthropogenic-based regional-scale factors most consistently explain plot-level exotic diversity in grasslands

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Anthropogenic-based regional-scale factors most consistently explain plot-level exotic diversity in grasslands. / MacDougall, Andrew S.; Bennett, Joseph R.; Firn, Jennifer; Seabloom, Eric W.; Borer, Elizabeth T.; Lind, Eric M.; Orrock, John L.; Harpole, W. Stanley; Hautier, Yann; Adler, Peter B.; Cleland, Elsa; Davies, Kendi; Melbourne, Brett; Prober, Suzanne M.; Bakker, Jonathan D.; Fay, Philip A.; Jin, Virginia L.; Kendig, Amy; La Pierre, Kimberly J.; Moore, Joslin; Morgan, John; Stevens, Carly J.

In: Global Ecology and Biogeography, Vol. 23, No. 7, 07.2014, p. 802-810.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

MacDougall, AS, Bennett, JR, Firn, J, Seabloom, EW, Borer, ET, Lind, EM, Orrock, JL, Harpole, WS, Hautier, Y, Adler, PB, Cleland, E, Davies, K, Melbourne, B, Prober, SM, Bakker, JD, Fay, PA, Jin, VL, Kendig, A, La Pierre, KJ, Moore, J, Morgan, J & Stevens, CJ 2014, 'Anthropogenic-based regional-scale factors most consistently explain plot-level exotic diversity in grasslands', Global Ecology and Biogeography, vol. 23, no. 7, pp. 802-810. https://doi.org/10.1111/geb.12157

APA

MacDougall, A. S., Bennett, J. R., Firn, J., Seabloom, E. W., Borer, E. T., Lind, E. M., Orrock, J. L., Harpole, W. S., Hautier, Y., Adler, P. B., Cleland, E., Davies, K., Melbourne, B., Prober, S. M., Bakker, J. D., Fay, P. A., Jin, V. L., Kendig, A., La Pierre, K. J., ... Stevens, C. J. (2014). Anthropogenic-based regional-scale factors most consistently explain plot-level exotic diversity in grasslands. Global Ecology and Biogeography, 23(7), 802-810. https://doi.org/10.1111/geb.12157

Vancouver

MacDougall AS, Bennett JR, Firn J, Seabloom EW, Borer ET, Lind EM et al. Anthropogenic-based regional-scale factors most consistently explain plot-level exotic diversity in grasslands. Global Ecology and Biogeography. 2014 Jul;23(7):802-810. https://doi.org/10.1111/geb.12157

Author

MacDougall, Andrew S. ; Bennett, Joseph R. ; Firn, Jennifer ; Seabloom, Eric W. ; Borer, Elizabeth T. ; Lind, Eric M. ; Orrock, John L. ; Harpole, W. Stanley ; Hautier, Yann ; Adler, Peter B. ; Cleland, Elsa ; Davies, Kendi ; Melbourne, Brett ; Prober, Suzanne M. ; Bakker, Jonathan D. ; Fay, Philip A. ; Jin, Virginia L. ; Kendig, Amy ; La Pierre, Kimberly J. ; Moore, Joslin ; Morgan, John ; Stevens, Carly J. / Anthropogenic-based regional-scale factors most consistently explain plot-level exotic diversity in grasslands. In: Global Ecology and Biogeography. 2014 ; Vol. 23, No. 7. pp. 802-810.

Bibtex

@article{6643809a0abf4bda961cfc07d335dbec,
title = "Anthropogenic-based regional-scale factors most consistently explain plot-level exotic diversity in grasslands",
abstract = "Aim Evidence linking the accumulation of exotic species to the suppression of native diversity is equivocal, often relying on data from studies that have used different methods. Plot-level studies often attribute inverse relationships between native and exotic diversity to competition, but regional abiotic filters, including anthropogenic influences, can produce similar patterns. We seek to test these alternatives using identical scale-dependent sampling protocols in multiple grasslands on two continents. Location Thirty-two grassland sites in North America and Australia. Methods We use multiscale observational data, collected identically in grain and extent at each site, to test the association of local and regional factors with the plot-level richness and abundance of native and exotic plants. Sites captured environmental and anthropogenic gradients including land-use intensity, human population density, light and soil resources, climate and elevation. Site selection occurred independently of exotic diversity, meaning that the numbers of exotic species varied randomly thereby reducing potential biases if only highly invaded sites were chosen. Results Regional factors associated directly or indirectly with human activity had the strongest associations with plot-level diversity. These regional drivers had divergent effects: urban-based economic activity was associated with high exotic:native diversity ratios; climate- and landscape-based indicators of lower human population density were associated with low exotic:native ratios. Negative correlations between plot-level native and exotic diversity, a potential signature of competitive interactions, were not prevalent; this result did not change along gradients of productivity or heterogeneity. Main conclusion We show that plot-level diversity of native and exotic plants are more consistently associated with regional-scale factors relating to urbanization and climate suitability than measures indicative of competition. These findings clarify the long-standing difficulty in resolving drivers of exotic diversity using single-factor mechanisms, suggesting that multiple interacting anthropogenic-based processes best explain the accumulation of exotic diversity in modern landscapes.",
keywords = "Anthropogenic disturbance, environmental heterogeneity, exotic plant species, Nutnet (Nutrient Network), productivity, scale dependency, species diversity, PLANT INVASIONS, SPECIES RICHNESS, HUMAN-POPULATION, NORTH-AMERICA, BIOLOGICAL INVASIONS, UNITED-STATES, MAJOR CAUSE, BIODIVERSITY, PRODUCTIVITY, INVASIBILITY",
author = "MacDougall, {Andrew S.} and Bennett, {Joseph R.} and Jennifer Firn and Seabloom, {Eric W.} and Borer, {Elizabeth T.} and Lind, {Eric M.} and Orrock, {John L.} and Harpole, {W. Stanley} and Yann Hautier and Adler, {Peter B.} and Elsa Cleland and Kendi Davies and Brett Melbourne and Prober, {Suzanne M.} and Bakker, {Jonathan D.} and Fay, {Philip A.} and Jin, {Virginia L.} and Amy Kendig and {La Pierre}, {Kimberly J.} and Joslin Moore and John Morgan and Stevens, {Carly J.}",
year = "2014",
month = jul,
doi = "10.1111/geb.12157",
language = "English",
volume = "23",
pages = "802--810",
journal = "Global Ecology and Biogeography",
issn = "1466-822X",
publisher = "Blackwell Publishing Ltd",
number = "7",

}

RIS

TY - JOUR

T1 - Anthropogenic-based regional-scale factors most consistently explain plot-level exotic diversity in grasslands

AU - MacDougall, Andrew S.

AU - Bennett, Joseph R.

AU - Firn, Jennifer

AU - Seabloom, Eric W.

AU - Borer, Elizabeth T.

AU - Lind, Eric M.

AU - Orrock, John L.

AU - Harpole, W. Stanley

AU - Hautier, Yann

AU - Adler, Peter B.

AU - Cleland, Elsa

AU - Davies, Kendi

AU - Melbourne, Brett

AU - Prober, Suzanne M.

AU - Bakker, Jonathan D.

AU - Fay, Philip A.

AU - Jin, Virginia L.

AU - Kendig, Amy

AU - La Pierre, Kimberly J.

AU - Moore, Joslin

AU - Morgan, John

AU - Stevens, Carly J.

PY - 2014/7

Y1 - 2014/7

N2 - Aim Evidence linking the accumulation of exotic species to the suppression of native diversity is equivocal, often relying on data from studies that have used different methods. Plot-level studies often attribute inverse relationships between native and exotic diversity to competition, but regional abiotic filters, including anthropogenic influences, can produce similar patterns. We seek to test these alternatives using identical scale-dependent sampling protocols in multiple grasslands on two continents. Location Thirty-two grassland sites in North America and Australia. Methods We use multiscale observational data, collected identically in grain and extent at each site, to test the association of local and regional factors with the plot-level richness and abundance of native and exotic plants. Sites captured environmental and anthropogenic gradients including land-use intensity, human population density, light and soil resources, climate and elevation. Site selection occurred independently of exotic diversity, meaning that the numbers of exotic species varied randomly thereby reducing potential biases if only highly invaded sites were chosen. Results Regional factors associated directly or indirectly with human activity had the strongest associations with plot-level diversity. These regional drivers had divergent effects: urban-based economic activity was associated with high exotic:native diversity ratios; climate- and landscape-based indicators of lower human population density were associated with low exotic:native ratios. Negative correlations between plot-level native and exotic diversity, a potential signature of competitive interactions, were not prevalent; this result did not change along gradients of productivity or heterogeneity. Main conclusion We show that plot-level diversity of native and exotic plants are more consistently associated with regional-scale factors relating to urbanization and climate suitability than measures indicative of competition. These findings clarify the long-standing difficulty in resolving drivers of exotic diversity using single-factor mechanisms, suggesting that multiple interacting anthropogenic-based processes best explain the accumulation of exotic diversity in modern landscapes.

AB - Aim Evidence linking the accumulation of exotic species to the suppression of native diversity is equivocal, often relying on data from studies that have used different methods. Plot-level studies often attribute inverse relationships between native and exotic diversity to competition, but regional abiotic filters, including anthropogenic influences, can produce similar patterns. We seek to test these alternatives using identical scale-dependent sampling protocols in multiple grasslands on two continents. Location Thirty-two grassland sites in North America and Australia. Methods We use multiscale observational data, collected identically in grain and extent at each site, to test the association of local and regional factors with the plot-level richness and abundance of native and exotic plants. Sites captured environmental and anthropogenic gradients including land-use intensity, human population density, light and soil resources, climate and elevation. Site selection occurred independently of exotic diversity, meaning that the numbers of exotic species varied randomly thereby reducing potential biases if only highly invaded sites were chosen. Results Regional factors associated directly or indirectly with human activity had the strongest associations with plot-level diversity. These regional drivers had divergent effects: urban-based economic activity was associated with high exotic:native diversity ratios; climate- and landscape-based indicators of lower human population density were associated with low exotic:native ratios. Negative correlations between plot-level native and exotic diversity, a potential signature of competitive interactions, were not prevalent; this result did not change along gradients of productivity or heterogeneity. Main conclusion We show that plot-level diversity of native and exotic plants are more consistently associated with regional-scale factors relating to urbanization and climate suitability than measures indicative of competition. These findings clarify the long-standing difficulty in resolving drivers of exotic diversity using single-factor mechanisms, suggesting that multiple interacting anthropogenic-based processes best explain the accumulation of exotic diversity in modern landscapes.

KW - Anthropogenic disturbance

KW - environmental heterogeneity

KW - exotic plant species

KW - Nutnet (Nutrient Network)

KW - productivity

KW - scale dependency

KW - species diversity

KW - PLANT INVASIONS

KW - SPECIES RICHNESS

KW - HUMAN-POPULATION

KW - NORTH-AMERICA

KW - BIOLOGICAL INVASIONS

KW - UNITED-STATES

KW - MAJOR CAUSE

KW - BIODIVERSITY

KW - PRODUCTIVITY

KW - INVASIBILITY

U2 - 10.1111/geb.12157

DO - 10.1111/geb.12157

M3 - Journal article

VL - 23

SP - 802

EP - 810

JO - Global Ecology and Biogeography

JF - Global Ecology and Biogeography

SN - 1466-822X

IS - 7

ER -