The importance of conspecific facilitation during recruitment and regeneration: A case study in degraded mangroves

Vogt, Juliane; Yue, Lin; Pranchai, Aor; Frohberg, Peter; Mehlig, Ulf; Berger, Uta

doi:10.1016/j.baae.2014.09.005

Cited by 27 publications

(29 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These changes resulted in the forest dieback and subsequent recolonization of the impacted area, mainly by A. germinans . Pore water salinity accumulated to extremely high levels (100 ppt at 50-cm depth), and the air surface temperature frequently exceeds 40 °C (Vogt et al, 2014). These environmental features contributed to the dwarfism of recolonizing individuals (Cohen & Lara, 2003; Pranchai et al, 2017), whose shrub architecture (up to 2.0 m in height) contrasts to the former tall morphology (up to 30 m in height), still observed on surrounding areas, where the hydrology remained unaltered (Menezes, Berger, & Mehlig, 2008) (Figure 2b).…”

Section: Methodsmentioning

confidence: 99%

Molecular responses to freshwater limitation in the mangrove tree Avicennia germinans (Acanthaceae)

Cruz

Mori

et al. 2019

Preprint

View full text Add to dashboard Cite

Environmental variation along the geographical space can shape populations by natural selection. In the context of global warming and changing precipitation regimes, it is crucial to understand the role of environmental heterogeneity in tropical trees adaptation, given their disproportional contribution to water and carbon biogeochemical cycles. Here, we investigated how heterogeneity in freshwater availability along tropical wetlands has influenced molecular variations of the black mangrove (Avicennia germinans). A total of 57 trees were sampled at seven sites differing markedly in precipitation regime and riverine freshwater inputs. Using 2,297 genome‐wide single nucleotide polymorphic markers, we found signatures of natural selection by the association between variations in allele frequencies and environmental variables, including the precipitation of the warmest quarter and the annual precipitation. Additionally, we found candidate loci for selection based on statistical deviations from neutral expectations of interpopulation differentiation. Most candidate loci within transcribed sequences were functionally associated with central aspects of drought tolerance or plant response to drought. Moreover, our results suggest the occurrence of the rapid evolution of a population, probably in response to sudden and persistent limitations in plant access to soil water, following a road construction in 1974. Observations supporting rapid evolution included the reduction in tree size and changes in allele frequencies and in transcript expression associated with increased drought tolerance through the accumulation of osmoprotectants and antioxidants, biosynthesis of cuticles, protection against protein degradation, stomatal closure, photorespiration and photosynthesis. We describe a major role of spatial heterogeneity in freshwater availability in the specialization of this typically tropical tree.

show abstract

Section: Methodsmentioning

confidence: 99%

Molecular responses to freshwater limitation in the mangrove tree Avicennia germinans (Acanthaceae)

Cruz

Mori

et al. 2019

Preprint

View full text Add to dashboard Cite

show abstract

“…The functional annotation and subsequent assignment of most putative protein-coding transcripts to GO terms (76.24%; Figure S4) enabled the assessment of DETs that highlighted key aspects of a differential response of A. germinans to contrasting source environments, differing markedly in hydrological regime, soil pore water salinity, solar radiation and surface temperature (Lara & Cohen, 2006;Pranchai et al, 2017;Vogt et al, 2014). We focused this analysis on enriched biological processes previously identified to be involved in the tolerance, resistance or response to osmotic and drought stress in various crops, model and nonmodel species, including mangroves ( Figure 5).…”

Section: Differential Transcript Expression Analysismentioning

confidence: 99%

“…The changed hydrology resulted in forest dieback and subsequent recolonization of the degraded area, mainly by A. germinans. Pore water salinity accumulated to extremely high levels (100 ppt at 50 cm depth), and the air surface temperature frequently exceeded 40°C (Vogt et al, 2014). These environmental features contributed to the dwarfism of recolonizing individuals (Cohen & Lara, 2003;Pranchai et al, 2017), whose shrub architecture (up to 2.0 m in height) contrasts the former tall morphology (up to 30 m in height), which is still observed in surrounding areas where the hydrology remained unaltered (Menezes, Berger, & Mehlig, 2008; Figure 2b).…”

Section: Study Areamentioning

confidence: 99%

Molecular responses to freshwater limitation in the mangrove tree Avicennia germinans (Acanthaceae)

Cruz

Mori

et al. 2019

Molecular Ecology

View full text Add to dashboard Cite

Environmental variation along the geographical space can shape populations by natural selection. In the context of global warming and changing precipitation regimes, it is crucial to understand the role of environmental heterogeneity in tropical trees adaptation, given their disproportional contribution to water and carbon biogeochemical cycles. Here, we investigated how heterogeneity in freshwater availability along tropical wetlands has influenced molecular variations of the black mangrove (Avicennia germinans). A total of 57 trees were sampled at seven sites differing markedly in precipitation regime and riverine freshwater inputs. Using 2,297 genome-wide single nucleotide polymorphic markers, we found signatures of natural selection by the association between variations in allele frequencies and environmental variables, including the precipitation of the warmest quarter and the annual precipitation. Additionally, we found candidate loci for selection based on statistical deviations from neutral expectations of interpopulation differentiation. Most candidate loci within transcribed sequences were functionally associated with central aspects of drought tolerance or plant response to drought. Moreover, our results suggest the occurrence of the rapid evolution of a population, probably in response to sudden and persistent limitations in plant access to soil water, following a road construction in 1974. Observations supporting rapid evolution included the reduction in tree size and changes in allele frequencies and in transcript expression associated with increased drought tolerance through the accumulation of osmoprotectants and antioxidants, biosynthesis of cuticles, protection against protein degradation, stomatal closure, photorespiration and photosynthesis. We describe a major role of spatial heterogeneity in freshwater availability in the specialization of this typically tropical tree. K E Y W O R D SAvicennia germinans (Black Mangrove), drought-tolerance, ecological genomics, nextRAD, RNA-Seq, tropical tree | 345 CRUZ et al.

show abstract

“…The best known inhibitory effects occur through niche preemption, when early founders monopolize important resources that would otherwise be available to other species (De Meester et al, 2016;Fukami, 2015;Sutherland, 1978), or when first colonizers act as ecosystem engineers, modifying their habitat and preventing the establishment of other organisms (Bonnici, Evans, Borg, & Schembri, 2012;Jones, Lawton, & Shachak, 1994). Depending on intrinsic species traits, however, ecosystem engineering may otherwise play an opposite role and facilitate species arriving later (Fukami, 2015;Jones et al, 1994), for example, by providing tridimensional substrates and therefore increasing settlement grounds (Russ, 1980), or through the mitigation of abiotic stress by supplying more benign microhabitats (Jurgens & Gaylord, 2016;Perea & Gil, 2014;Vogt et al, 2014), ultimately leading to species coexistence and an increase of biodiversity.…”

mentioning

confidence: 99%

“…Attraction through chemical cues may constitute an efficient way to promote aggregation in suitable habitats (Pawlik, 1992;Robinson, Larsen, & Kerr, 2011;Silva-Filho, Bailez, & Viana-Bailez, 2012), indirectly increasing the strength of densitydependent regulation mechanisms of founder populations. Positive density-dependent interactions include the mitigation of abiotic stress in crowding intertidal invertebrates (Jurgens & Gaylord, 2016;Minchinton, 1997), caterpillars (Klok & Chown, 1999), and plants (Vogt et al, 2014); enhanced reproduction, such as fruit dispersal in plants (Blendinger, Loiselle, & Blake, 2008) and fertilization in marine invertebrates (Kent, Hawkins, & Doncaster, 2003;Levitan, Sewell, & Chia, 1992) and terrestrial woodlice (Broly, Deneubourg, & Devigne, 2013); and diminishing of predation risk in invertebrates (Denno & Benrey, 1997;Turchin & Kareiva, 1989) and vertebrates (Blumstein & Daniel, 2003;Carrascal, Alonso, & Alonso, 1990). Negative interactions usually lie in some sort of intraspecific competition, which may reach unsustainable levels under conditions of very high-population density (Branch, 1975;Chisholm & Muller-Landau, 2011;Gerla & Mooij, 2014;Hart & Marshall, 2009;Robins & Reid, 1997).…”

mentioning

confidence: 99%

Persistence and space preemption explain species‐specific founder effects on the organization of marine sessile communities

Vieira

Flores

Dias

2018

Ecology and Evolution

View full text Add to dashboard Cite

Community assembly may not follow predictable successional stages, with a large fraction of the species pool constituted by potential pioneering species and successful founders defined through lottery. In such systems, priority effects may be relevant in the determination of trajectories of developing communities and hence diversity and assemblage structure at later advanced states. In order to assess how different founder species may trigger variable community trajectories and structures, we conducted an experimental study using subtidal sessile assemblages as model. We manipulated the identity of functionally different founders and initial colony size (a proxy of the time lag before the arrival of later species), and followed trajectories. We did not observe any effects of colony size on response variables, suggesting that priority effects take place even when the time lag between the establishment of pioneering species and late colonizers is very short. Late community structure at experimental panels that started either with the colonial ascidian Botrylloides nigrum, or the arborescent bryozoan Bugula neritina, was similar to control panels allowed natural assembling. In spite of high potential for fast space domination, and hence negative priority effects, B. nigrum suffered high mortality and did not persist throughout succession. Bugula neritina provided complex physical microhabitats through conspecific clustering that have enhanced larval settlement of late species arrivals, but no apparent facilitation was observed. Differently, panels founded by the encrusting bryozoan Schizoporella errata led to different and less diverse communities compared to naturally assembled panels, evidencing strong negative priority effects through higher persistence and space preemption. Schizoporella errata founder colonies inhibited further conspecific settlement, which may greatly relax intraspecific competition, allowing resource allocation to colony growth and space domination, thus reducing the chances for the establishment of other species.

show abstract

The importance of conspecific facilitation during recruitment and regeneration: A case study in degraded mangroves

Cited by 27 publications

References 41 publications

Molecular responses to freshwater limitation in the mangrove tree Avicennia germinans (Acanthaceae)

Molecular responses to freshwater limitation in the mangrove tree Avicennia germinans (Acanthaceae)

Molecular responses to freshwater limitation in the mangrove tree Avicennia germinans (Acanthaceae)

Persistence and space preemption explain species‐specific founder effects on the organization of marine sessile communities

Contact Info

Product

Resources

About