Bidirectional gene flow on a mangrove river landscape and between-catchment dispersal of Rhizophora racemosa (Rhizophoraceae)

Ngeve, Magdalene N.; Stocken, Tom Van der; Sierens, Timothy; Koedam, Nico; Triest, Ludwig

doi:10.1007/s10750-016-3021-2

Cited by 20 publications

(21 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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, ). We hypothesized that the level of genetic structure found on each coast would be related to differences in each coast's features.…”

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

View full text Add to dashboard Cite

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.

show abstract

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

View full text Add to dashboard Cite

show abstract

“…within the parental mangrove stand. Genetic estimation of migration rates indicated that dispersal could occur bidirectionally within an estuary, due to the opposite effects of river flow currents and incoming tides (Ngeve et al , ). Even at the intermediary geographic scale (hundreds of kilometers), propagule dispersal can be limited to adjacent or neighbouring populations.…”

Section: Spatial Scale Of Dispersal and Methodological Approachesmentioning

confidence: 99%

A general framework for propagule dispersal in mangroves

et al. 2019

Self Cite

View full text Add to dashboard Cite

Dispersal allows species to shift their distributions in response to changing climate conditions. As a result, dispersal is considered a key process contributing to a species' long-term persistence. For many passive dispersers, fluid dynamics of wind and water fuel these movements and different species have developed remarkable adaptations for utilizing this energy to reach and colonize suitable habitats. The seafaring propagules (fruits and seeds) of mangroves represent an excellent example of such passive dispersal. Mangroves are halophytic woody plants that grow in the intertidal zones along tropical and subtropical shorelines and produce hydrochorous propagules with high dispersal potential. This results in exceptionally large coastal ranges across vast expanses of ocean and allows species to shift geographically and track the conditions to which they are adapted. This is particularly relevant given the challenges presented by rapid sea-level rise, higher frequency and intensity of storms, and changes in regional precipitation and temperature regimes. However, despite its importance, the underlying drivers of mangrove dispersal have typically been studied in isolation, and a conceptual synthesis of mangrove oceanic dispersal across spatial scales is lacking. Here, we review current knowledge on mangrove propagule dispersal across the various stages of the dispersal process. Using a general framework, we outline the mechanisms and ecological processes that are known to modulate the spatial patterns of mangrove dispersal. We show that important dispersal factors remain understudied and that adequate empirical data on the determinants of dispersal are missing for most mangrove species. This review particularly aims to provide a baseline for developing future research agendas and field campaigns, filling current knowledge gaps and increasing our understanding of the processes that shape global mangrove distributions.

show abstract

“…Such findings indicate that sexual reproduction is naturally quite common. In addition, little genetic differentiation among populations has been found for many wetland species, which is an indicator of high gene flow among wetlands via seeds (Santamaría, 2002;Pollux et al, 2009;Nilsson et al, 2010;Sweetman et al, 2013;Ngeve et al, 2017;Orsenigo et al, 2017;Kettenring et al, 2019b;Lobato de Magalhães et al, 2020).…”

Section: Ecological Genetic and Evolutionary Benefits Of Seedingmentioning

confidence: 99%

Need to Seed? Ecological, Genetic, and Evolutionary Keys to Seed-Based Wetland Restoration

Kettenring

Tarsa

2020

Front. Environ. Sci.

View full text Add to dashboard Cite

As we approach the Decade of Ecosystem Restoration (2021-2030), there is renewed focus on improving wetland restoration practices to reestablish the habitat and climate mitigation functions and services that wetlands provide. A first step in restoring these functions and services is to reestablish the native vegetation structure and composition through strategic seed-based approaches. These approaches should be driven by ecological, genetic, and evolutionary principles, along with consideration for economics, logistics, and other social constraints. Effective seed-based approaches must consider the chosen species, seed sourcing, dormancy break and germination requirements, seed enhancement technologies, potential invaders, seeding densities, and long-term monitoring. Choice of species should reflect historical plant communities and future environmental conditions, species that support functional goals including invasion resistance, and seed availability constraints. Furthermore, seeds should be sourced to ensure ample genetic diversity to support multifunctionality and evolutionary capacity while also considering the broad natural dispersal of many wetland species. The decision to collect wild seeds or purchase seeds will also impact species choice and genetic diversity, which can have cascading effects for functional goals. To ensure seedling establishment, seed dormancy should be addressed through dormancy breaking treatments and the potentially narrow germination requirements of some species will require targeted sowing timing and location to align with safe sites. Other seed enhancements such as priming and coatings are poorly developed for wetland restoration and their potential for improving establishment is unknown. Because wetlands are highly invasion prone, potential invaders and their legacies should be addressed. Seeding densities should strike a balance between outcompeting invaders and preserving valuable seed resources. Invader control and long-term monitoring is key to improving revegetation and restoration. Here, we review scientific advances to improve revegetation outcomes, and provide methods and recommendations to help achieve the desired goals. Gaps in knowledge about seed-based wetland restoration currently exist, however, and untested practices will certainly increase risks in future efforts. These efforts can be used to better understand the ecological, genetic, and evolutionary processes related to wetland seeds, which will bring us one step closer to seed-based restoration of functions and services needed for human and ecological communities.

show abstract

Bidirectional gene flow on a mangrove river landscape and between-catchment dispersal of Rhizophora racemosa (Rhizophoraceae)

Cited by 20 publications

References 62 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

A general framework for propagule dispersal in mangroves

Need to Seed? Ecological, Genetic, and Evolutionary Keys to Seed-Based Wetland Restoration

Contact Info

Product

Resources

About