:We investigated the seed biology of the beach clustervine (Jacquemontia reclinata House [Convolv... more :We investigated the seed biology of the beach clustervine (Jacquemontia reclinata House [Convolvulaceae]), a federally endangered Florida endemic, through the study of soil seedbanks, including sampling of seed densities at varying locations and times of the year, and through several seed survival experiments in 2001, 2003, 2006, and 2007. Based on soil core and vacuum samples, seeds are present in
... adequately tests theory are rare (eg, McEachern, Bowles, & Pavlovic, 1994) and may ta... more ... adequately tests theory are rare (eg, McEachern, Bowles, & Pavlovic, 1994) and may take years to complete (Bell, Bowles, & ... populations will potentially favour dispersal across sites and may be important for population expansion (Jacquemyn, Butaye, & Hermy, 2003; Ricketts & ...
This article appeared in a journal published by Elsevier. The attached copy is furnished to the a... more This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: http://www.elsevier.com/copyright Author's personal copy When is local the best paradigm? Breeding history influences conservation reintroduction survival and population trajectories in times of extreme climate events
:We investigated the seed biology of the beach clustervine (Jacquemontia reclinata House [Convolv... more :We investigated the seed biology of the beach clustervine (Jacquemontia reclinata House [Convolvulaceae]), a federally endangered Florida endemic, through the study of soil seedbanks, including sampling of seed densities at varying locations and times of the year, and through several seed survival experiments in 2001, 2003, 2006, and 2007. Based on soil core and vacuum samples, seeds are present in
Population viability and metapopulation theory and models are heuristic tools that can be used to... more Population viability and metapopulation theory and models are heuristic tools that can be used to plan restorations and assess their success. Using examples from South Florida, USA, we review background information and ongoing reintroduction experiments with the federally endangered coastal perennial vine, beach jacquemontia, Jacquemontia reclinata (Convolvulaceae). All known wild populations are declining in isolated habitat fragments varying in size, occupied area, and degree of isolation. Eleven reintroduction sites ranging in size from 422 to 4800 m2 within the extant species’ range have been identified that have characteristics suitable for J. reclinata introductions and have land managers amenable to restoration efforts. Previous RAPD analysis indicated that genetic diversity of natural populations was positively correlated with population size; the two largest populations had the highest genetic diversity and the smallest populations had relatively low genetic diversity. Despite habitat fragmentation and large distances between some populations, migration rates were very high among populations (m=4.05m=4.05). Experimental crosses indicated the species has a mixed mating system. From 2001 to 2005, we have introduced 935 J. reclinata in seven experiments in five locations using plants propagated ex situ at Fairchild Tropical Botanic Garden. Reintroductions have dramatically increased the number of plants in the wild by 72%. Survival from the time of transplant to 2005 ranged from 2% to 97%, was not significantly correlated with metapopulation parameters, such as, founding population size, patch size, or connectivity to extant populations. Reintroduced plants are contributing seed and pollen to the wild populations, but no recruited seedlings have yet been observed. Although it may take decades before we can consider the reintroduced populations to be self-sustainable, we argue that planning restorations for rare species based on predictions from ecological theory is advisable to allow a higher probability of success.
Creating self-sustaining populations resilient to stochastic events is the goal of conservation r... more Creating self-sustaining populations resilient to stochastic events is the goal of conservation reintroductions. Concern about disrupting locally co-adapted gene complexes, outbreeding depression, and hybridization has led to a “local is best paradigm” for source selection, yet this policy constrains rare plant reintroduction efforts and may not always best conserve rare species. Using progeny from controlled crosses (control, selfed, near neighbor, far neighbor and between sites) with maternal plants from two sites, we tested survival and population trajectories of US endangered Jacquemontia reclinata reintroduced in 2004 and 2005 to three sites. By 2011, survival and recruitment was greatest for mixed-population progeny, was consistent across years, and became most apparent after extreme climate events (hurricanes, drought, and exceptional cold). Populations founded from mixed sources exhibited greater resilience to stochastic disturbances than those from a single source and had positive projected population growth at two of three sites. Recipient sites most proximal to maternal origin were not those with best survival. Maximizing reintroduced population persistence calls for re-examining paradigms, using decision trees and reintroduction guidelines to guide source selection choices. The local is best paradigm may be dooming many reintroductions to failure.
:We investigated the seed biology of the beach clustervine (Jacquemontia reclinata House [Convolv... more :We investigated the seed biology of the beach clustervine (Jacquemontia reclinata House [Convolvulaceae]), a federally endangered Florida endemic, through the study of soil seedbanks, including sampling of seed densities at varying locations and times of the year, and through several seed survival experiments in 2001, 2003, 2006, and 2007. Based on soil core and vacuum samples, seeds are present in
... adequately tests theory are rare (eg, McEachern, Bowles, & Pavlovic, 1994) and may ta... more ... adequately tests theory are rare (eg, McEachern, Bowles, & Pavlovic, 1994) and may take years to complete (Bell, Bowles, & ... populations will potentially favour dispersal across sites and may be important for population expansion (Jacquemyn, Butaye, & Hermy, 2003; Ricketts & ...
This article appeared in a journal published by Elsevier. The attached copy is furnished to the a... more This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: http://www.elsevier.com/copyright Author's personal copy When is local the best paradigm? Breeding history influences conservation reintroduction survival and population trajectories in times of extreme climate events
:We investigated the seed biology of the beach clustervine (Jacquemontia reclinata House [Convolv... more :We investigated the seed biology of the beach clustervine (Jacquemontia reclinata House [Convolvulaceae]), a federally endangered Florida endemic, through the study of soil seedbanks, including sampling of seed densities at varying locations and times of the year, and through several seed survival experiments in 2001, 2003, 2006, and 2007. Based on soil core and vacuum samples, seeds are present in
Population viability and metapopulation theory and models are heuristic tools that can be used to... more Population viability and metapopulation theory and models are heuristic tools that can be used to plan restorations and assess their success. Using examples from South Florida, USA, we review background information and ongoing reintroduction experiments with the federally endangered coastal perennial vine, beach jacquemontia, Jacquemontia reclinata (Convolvulaceae). All known wild populations are declining in isolated habitat fragments varying in size, occupied area, and degree of isolation. Eleven reintroduction sites ranging in size from 422 to 4800 m2 within the extant species’ range have been identified that have characteristics suitable for J. reclinata introductions and have land managers amenable to restoration efforts. Previous RAPD analysis indicated that genetic diversity of natural populations was positively correlated with population size; the two largest populations had the highest genetic diversity and the smallest populations had relatively low genetic diversity. Despite habitat fragmentation and large distances between some populations, migration rates were very high among populations (m=4.05m=4.05). Experimental crosses indicated the species has a mixed mating system. From 2001 to 2005, we have introduced 935 J. reclinata in seven experiments in five locations using plants propagated ex situ at Fairchild Tropical Botanic Garden. Reintroductions have dramatically increased the number of plants in the wild by 72%. Survival from the time of transplant to 2005 ranged from 2% to 97%, was not significantly correlated with metapopulation parameters, such as, founding population size, patch size, or connectivity to extant populations. Reintroduced plants are contributing seed and pollen to the wild populations, but no recruited seedlings have yet been observed. Although it may take decades before we can consider the reintroduced populations to be self-sustainable, we argue that planning restorations for rare species based on predictions from ecological theory is advisable to allow a higher probability of success.
Creating self-sustaining populations resilient to stochastic events is the goal of conservation r... more Creating self-sustaining populations resilient to stochastic events is the goal of conservation reintroductions. Concern about disrupting locally co-adapted gene complexes, outbreeding depression, and hybridization has led to a “local is best paradigm” for source selection, yet this policy constrains rare plant reintroduction efforts and may not always best conserve rare species. Using progeny from controlled crosses (control, selfed, near neighbor, far neighbor and between sites) with maternal plants from two sites, we tested survival and population trajectories of US endangered Jacquemontia reclinata reintroduced in 2004 and 2005 to three sites. By 2011, survival and recruitment was greatest for mixed-population progeny, was consistent across years, and became most apparent after extreme climate events (hurricanes, drought, and exceptional cold). Populations founded from mixed sources exhibited greater resilience to stochastic disturbances than those from a single source and had positive projected population growth at two of three sites. Recipient sites most proximal to maternal origin were not those with best survival. Maximizing reintroduced population persistence calls for re-examining paradigms, using decision trees and reintroduction guidelines to guide source selection choices. The local is best paradigm may be dooming many reintroductions to failure.
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