Postglacial expansion pathways of red mangrove, <i>Rhizophora mangle</i>, in the Caribbean Basin and Florida

Kennedy, John Paul; Pil, Maria W.; Proffitt, C. Edward; Boeger, Walter A.; Stanford, Alice M.; Devlin, Donna J.

doi:10.3732/ajb.1500183

Cited by 44 publications

(38 citation statements)

References 120 publications

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“…Our data suggest that populations in and around Texas likely originated from recent founder events from stands in the central Gulf of Mexico (Tamaulipas), while those in Florida could be the result of migration from populations in the Caribbean via the Loop Current, as reported by Kennedy et al. () for R. mangle . Based on the information available for A. germinans , we further hypothesize that populations from the Yucatan Peninsula (PY70, PY81, PY65 and PY77) maintained a substantial gene flow with other stands in the Caribbean (e.g.…”

Section: Discussionsupporting

confidence: 76%

“…Isolation by distance seem typical of mangroves (Cerón‐Souza et al., ; Kennedy et al., ; Sandoval‐Castro et al., ). However, it has been suggested that factors other than absolute geographic distance should be also considered, including water velocity (Nathan et al., ), the retention of propagules by roots (Van der Stocken et al., ), tides (Ngeve, van der Stocken, Sierens, Koedam, & Triest, ), the direction of wind and local currents, and coastal topography (Yan, Duke, & Sun, ).…”

Section: Discussionmentioning

confidence: 99%

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Contrasting colonization patterns of black mangrove (Avicennia germinans (L.) L.) gene pools along the Mexican coasts

Ochoa‐Zavala

Jaramillo‐Correa²,

Nettel‐Hernanz

et al. 2019

Journal of Biogeography

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Aim Historical and geological events can impact the genetic structure of species, producing signatures that vary among taxa and among gene pools within taxa. Such signatures can also be affected by local geography and tolerance to environmental conditions. However, disentangling the different drivers of population structure is often difficult. In an attempt to do so, we surveyed two independent gene pools of the same species that followed similar paths of post‐glacial colonization across contrasting landscapes and environmental conditions. We aimed to determine how these differences have affected the post‐glacial population dynamics of each gene pool. Location The Pacific and Atlantic coasts of Mexico. Taxon Black mangrove (Avicennia germinans; Avicenniaceae). Methods Using microsatellite variation, we estimated the divergence time of black mangrove populations through approximated Bayesian computation and implemented a comparative approach to evaluate different demographic hypotheses within and between coasts. Results The Pacific and Atlantic gene pools diverged long after the rise of the Central American Isthmus (Mid‐Pleistocene), although occasional transisthmian gene exchanges were also inferred. Both coasts showed the characteristic isolation by distance (IBD) pattern expected for expanding gene pools. However, populations from the Atlantic coast were more genetically diverse and admixed than those from the Pacific basin. Both our migration models and the climate data gathered suggested a more ancient establishment and/or more stable conditions for black mangrove on the Atlantic coast. Main conclusions The Atlantic basin likely bore more favourable climate conditions than the Pacific, allowing for the survival of A. germinans during the Last Glacial Maximum in situ. Populations from the northern Pacific coast became established after the Holocene warming, leading to contrasting genetic patterns between the two gene pools. Nevertheless, the action of environmental factors in determining the contemporary distribution of genetic variation in A. germinans cannot be discarded.

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Section: Discussionsupporting

confidence: 76%

Section: Discussionmentioning

confidence: 99%

Contrasting colonization patterns of black mangrove (Avicennia germinans (L.) L.) gene pools along the Mexican coasts

Ochoa‐Zavala

Jaramillo‐Correa²,

Nettel‐Hernanz

et al. 2019

Journal of Biogeography

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“…Mangrove genetic diversity is generally greater at the range centre (review by Triest, 2008) and an inverse relationship between diversity and latitude exists for R. mangle toward their range edge (Pil et al, 2011;Sandoval-Castro et al, 2012). Kennedy et al (2016) found greater genetic diversity within an East Florida R. mangle population compared to those from South and West Florida, and attributed this difference to the proximity of East Florida to regional ocean currents that provide greater connectivity to putative glacial refugia along the Caribbean mainland of Central America.…”

Section: Introductionmentioning

confidence: 99%

“…1). Three populations were included in a study on R. mangle post-glacial expansion history in the Caribbean Basin (Kennedy et al, 2016; Table 1). Interpopulation distance ranges from c. 55 to 1240 km.…”

Section: Collection and Dna Isolationmentioning

confidence: 99%

“…Each sampled R. mangle population was represented by the closest model locations, and additional locations between these populations were considered as unsampled stepping-stones. We calculated mean transport success between all pairwise combinations of R. mangle populations and stepping-stones and, for our analysis, we calculated stepping-stone transport success (via unsampled stepping-stones) between all R. mangle population pairs following calculations Kennedy et al (2016). ‡Values adjusted for potential null alleles.…”

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confidence: 99%

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Contrasting genetic effects of red mangrove (Rhizophora mangle L.) range expansion along West and East Florida

Kennedy

Garavelli

Truelove

et al. 2016

Journal of Biogeography

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Aim We evaluated underlying mechanisms and genetic effects of climatedriven range expansion of Rhizophora mangle L., a coastal foundation species, along both West (WFL) and East (EFL) Florida, USA.Location Eight sites encompassing the entire Florida R. mangle range at a regional scale.Methods We characterized R. mangle population genetic structure with a combination of genetic analyses using seven microsatellite loci and modelbased propagule transport. We tested hypotheses on the genetic effects of range expansion along both WFL and EFL. Finally, we compared WFL and EFL range edges and assessed potential factors shaping observed differences.Results Regional-scale Florida R. mangle genetic structure is shaped in part by the non-independent effects of geographical distance and ocean currents that drive asymmetric propagule transport from WFL to EFL. WFL conformed to theoretical expectations of range expansion, with pronounced divergence at the range edge, whereas EFL deviated from expectations. Significant differences in diversity and differentiation at the WFL and EFL range edges were attributed to differences in migration rates, population size and founder effects.Main conclusions Contrasting genetic landscapes at the WFL and EFL range edges are in part the product of variation in ocean circulation and demographic history. These underlying mechanisms may have potential ecological and evolutionary consequences that need to be addressed with further empirical research.

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Community phylogeny of the globally critically imperiled pine rockland ecosystem

Trotta

Baiser

Possley

et al. 2018

American J of Botany

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Community phylogenetic methods incorporate information on evolutionary relationships into studies of organismal assemblages. We used a community phylogenetic framework to investigate relationships and biogeographic affinities and to calculate phylogenetic signal of endemism and invasiveness for the flora of the pine rocklands-a globally critically imperiled ecosystem with a significant portion of its distribution in South Florida, United States. METHODS:We reconstructed phylogenetic relationships of 538 vascular plant taxa, which represent 92.28% of the vascular flora of the pine rocklands. We estimated phylogenetic signal for endemism and invasiveness using phylogenetic generalized linear mixed models. We determined the native range for each species in the data set and calculated the total number of species sourced from each region and all possible combinations of these regions. KEY RESULTS:The pine rockland flora includes representatives of all major vascular plant lineages, and most species have native ranges in the New World. There was strong phylogenetic signal for endemism, but not for invasiveness.CONCLUSIONS: Community phylogenetics has high potential value for conservation planning, particularly for fragmented and endangered ecosystems like the pine rockland. Strong phylogenetic signal for endemic species in our data set, which also tend to be threatened or endangered, can help to identify species at risk, as well as fragments where those species occur, highlighting conservation priorities. Our results indicate, at least in the pine rockland ecosystem, no phylogenetic signal for invasive species, and thus other information must be used to predict the potential for invasiveness.

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Postglacial expansion pathways of red mangrove, Rhizophora mangle, in the Caribbean Basin and Florida

Cited by 44 publications

References 120 publications

Contrasting colonization patterns of black mangrove (Avicennia germinans (L.) L.) gene pools along the Mexican coasts

Contrasting colonization patterns of black mangrove (Avicennia germinans (L.) L.) gene pools along the Mexican coasts

Contrasting genetic effects of red mangrove (Rhizophora mangle L.) range expansion along West and East Florida

Community phylogeny of the globally critically imperiled pine rockland ecosystem

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