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Regional environmental breadth predicts geographic range and longevity in fossil marine genera.
PLoS One. 2011 May 04; 6(5):e18946.Plos

Abstract

BACKGROUND

Geographic range is a good indicator of extinction susceptibility in fossil marine species and higher taxa. The widely-recognized positive correlation between geographic range and taxonomic duration is typically attributed to either accumulating geographic range with age or an extinction buffering effect, whereby cosmopolitan taxa persist longer because they are reintroduced by dispersal from remote source populations after local extinction. The former hypothesis predicts that all taxa within a region should have equal probabilities of extinction regardless of global distributions while the latter predicts that cosmopolitan genera will have greater survivorship within a region than endemics within the same region. Here we test the assumption that all taxa within a region have equal likelihoods of extinction.

METHODOLOGY/PRINCIPAL FINDINGS

We use North American and European occurrences of marine genera from the Paleobiology Database and the areal extent of marine sedimentary cover in North America to show that endemic and cosmopolitan fossil marine genera have significantly different range-duration relationships and that broad geographic range and longevity are both predicted by regional environmental breadth. Specifically, genera that occur outside of the focal region are significantly longer lived and have larger geographic ranges and environmental breadths within the focal region than do their endemic counterparts, even after controlling for differences in sampling intensity. Analyses of the number of paleoenvironmental zones occupied by endemic and cosmopolitan genera suggest that the number of paleoenvironmental zones occupied is a key factor of geographic range that promotes genus survivorship.

CONCLUSIONS/SIGNIFICANCE

Wide environmental tolerances within a single region predict both broad geographic range and increased longevity in marine genera over evolutionary time. This result provides a specific driving mechanism for the spatial and temporal distributions of marine genera at regional and global scales and is consistent with the niche-breadth hypothesis operating on macroevolutionary timescales.

Authors+Show Affiliations

Department of Geoscience, University of Wisconsin-Madison, Madison, Wisconsin, United States of America. nheim@wisc.eduNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

21573226

Citation

Heim, Noel A., and Shanan E. Peters. "Regional Environmental Breadth Predicts Geographic Range and Longevity in Fossil Marine Genera." PloS One, vol. 6, no. 5, 2011, pp. e18946.
Heim NA, Peters SE. Regional environmental breadth predicts geographic range and longevity in fossil marine genera. PLoS One. 2011;6(5):e18946.
Heim, N. A., & Peters, S. E. (2011). Regional environmental breadth predicts geographic range and longevity in fossil marine genera. PloS One, 6(5), e18946. https://doi.org/10.1371/journal.pone.0018946
Heim NA, Peters SE. Regional Environmental Breadth Predicts Geographic Range and Longevity in Fossil Marine Genera. PLoS One. 2011 May 4;6(5):e18946. PubMed PMID: 21573226.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Regional environmental breadth predicts geographic range and longevity in fossil marine genera. AU - Heim,Noel A, AU - Peters,Shanan E, Y1 - 2011/05/04/ PY - 2010/10/28/received PY - 2011/03/25/accepted PY - 2011/5/17/entrez PY - 2011/5/17/pubmed PY - 2011/10/25/medline SP - e18946 EP - e18946 JF - PloS one JO - PLoS One VL - 6 IS - 5 N2 - BACKGROUND: Geographic range is a good indicator of extinction susceptibility in fossil marine species and higher taxa. The widely-recognized positive correlation between geographic range and taxonomic duration is typically attributed to either accumulating geographic range with age or an extinction buffering effect, whereby cosmopolitan taxa persist longer because they are reintroduced by dispersal from remote source populations after local extinction. The former hypothesis predicts that all taxa within a region should have equal probabilities of extinction regardless of global distributions while the latter predicts that cosmopolitan genera will have greater survivorship within a region than endemics within the same region. Here we test the assumption that all taxa within a region have equal likelihoods of extinction. METHODOLOGY/PRINCIPAL FINDINGS: We use North American and European occurrences of marine genera from the Paleobiology Database and the areal extent of marine sedimentary cover in North America to show that endemic and cosmopolitan fossil marine genera have significantly different range-duration relationships and that broad geographic range and longevity are both predicted by regional environmental breadth. Specifically, genera that occur outside of the focal region are significantly longer lived and have larger geographic ranges and environmental breadths within the focal region than do their endemic counterparts, even after controlling for differences in sampling intensity. Analyses of the number of paleoenvironmental zones occupied by endemic and cosmopolitan genera suggest that the number of paleoenvironmental zones occupied is a key factor of geographic range that promotes genus survivorship. CONCLUSIONS/SIGNIFICANCE: Wide environmental tolerances within a single region predict both broad geographic range and increased longevity in marine genera over evolutionary time. This result provides a specific driving mechanism for the spatial and temporal distributions of marine genera at regional and global scales and is consistent with the niche-breadth hypothesis operating on macroevolutionary timescales. SN - 1932-6203 UR - https://www.unboundmedicine.com/medline/citation/21573226/Regional_environmental_breadth_predicts_geographic_range_and_longevity_in_fossil_marine_genera_ L2 - https://dx.plos.org/10.1371/journal.pone.0018946 DB - PRIME DP - Unbound Medicine ER -