The role of very small fragments in conserving genetic diversity of a common tree in a hyper fragmented Brazilian Atlantic forest landscape

Martins, Karina; Kimura, Renato Kenji; Francisconi, Ana Flávia; Gezan, Salvador A.; Kainer, Karen A.; Christianini, Alexander V.

doi:10.1007/s10592-015-0800-7

Cited by 23 publications

(16 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, genetic analyses at landscape scale have revealed a decrease in genetic diversity of seedlings compared to adults (Martins et al 2016) in line with theoretical expectations of habitat fragmentation (Young et al 1996). The loss of genetic diversity is compatible with restricted seed dispersal and increased recruitment near parental plants (Martins et al 2016). Restricted dispersal is also expected to produce increasing levels of clumped spatial distribution (Souza & Martins 2004;Sica et al 2014) potentially enhancing distance-and densitydependent effects that decrease seedling density and survival, as demonstrated here.…”

Section: Discussionsupporting

confidence: 81%

“…In the study sites C. langsdorffii has abundant seedlings and saplings and its regeneration is not influenced by the proximity to edges or distance-and density-dependent effects (Martins et al 2016). However, genetic analyses at landscape scale have revealed a decrease in genetic diversity of seedlings compared to adults (Martins et al 2016) in line with theoretical expectations of habitat fragmentation (Young et al 1996). The loss of genetic diversity is compatible with restricted seed dispersal and increased recruitment near parental plants (Martins et al 2016).…”

Section: Discussionsupporting

confidence: 60%

“…This does not mean that S. romanzoffiana is free from negative effects produced by habitat fragmentation. We have no information about the genetic structure of S. romanzoffiana, but data on one of the most common local trees, the bird-dispersed legume Copaifera langsdorffii, is available (Martins et al 2016). In the study sites C. langsdorffii has abundant seedlings and saplings and its regeneration is not influenced by the proximity to edges or distance-and density-dependent effects (Martins et al 2016).…”

Section: Discussionmentioning

confidence: 99%

“…We have no information about the genetic structure of S. romanzoffiana, but data on one of the most common local trees, the bird-dispersed legume Copaifera langsdorffii, is available (Martins et al 2016). In the study sites C. langsdorffii has abundant seedlings and saplings and its regeneration is not influenced by the proximity to edges or distance-and density-dependent effects (Martins et al 2016). However, genetic analyses at landscape scale have revealed a decrease in genetic diversity of seedlings compared to adults (Martins et al 2016) in line with theoretical expectations of habitat fragmentation (Young et al 1996).…”

Section: Discussionmentioning

confidence: 99%

See 3 more Smart Citations

Reproductive phenology, seed removal and early regeneration in relation to distance from parental plants of a native palm in small Atlantic forest fragments

Mariano

Christianini

2016

Acta Bot. Bras.

Self Cite

View full text Add to dashboard Cite

Th e Brazilian Atlantic Forest is a global biodiversity hotspot, but most of what remains are small fragments. Small fragments are often harsh environments for forest plant recruitment due to edge eff ects and the loss of frugivorous animals that provide seed dispersal. We recorded the one-year reproductive phenology of the keystone palm Syagrus romanzoffi ana in small (<2.5ha) Atlantic Forest fragments in southeastern Brazil. We tested the Janzen-Connell hypothesis with seed-removal experiments and followed the fi ve-year survival of recruits in relation to the distance from parental plants. Palms produced many fruits throughout the year (mean 2,600/plant). More seedlings were found away from parental plants than near them, thereby supporting the Janzen-Connell hypothesis. Almost 45% of seedlings alive in 2010 were dead fi ve years later, but recruitment of new seedlings compensated for this mortality. Distance-dependent factors infl uenced the density of early ontogenetic stages, but had limited eff ects on juveniles or on seed removal. High seed production, seed dispersal provided by disturbance-tolerant frugivores and the relatively long-term survival of adults, seedlings and juveniles seem to allow the persistence of S. romanzoffi ana in the forest fragments, but possibly at the cost of an increased clumped distribution and reduced gene fl ow at the landscape scale.

show abstract

Section: Discussionsupporting

confidence: 81%

Section: Discussionsupporting

confidence: 60%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Reproductive phenology, seed removal and early regeneration in relation to distance from parental plants of a native palm in small Atlantic forest fragments

Mariano

Christianini

2016

Acta Bot. Bras.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Copaifera langsdorffii Desf., Fabaceae, subfamily Detarioideae (LPWG, 2017) is a neo-tropical tree that grows in a wide range of seasonal environments. The seedlings present great capacity to survive under contrasting light and water availability (Carvalho, 2003), being largely tolerant to environmental conditions found in fragmented environments as in Brazilian savanna (Martins et al, 2015). The wide distribution reflects the potential plasticity displayed by the species in response to different climatic regimes, presenting morphological and anatomical differences intraspecific in their populations (Melo Júnior et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

WATER DEFICIT ENSURES THE PHOTOCHEMICAL EFFICIENCY OF Copaifera langsdorffii Desf1

et al. 2017

View full text Add to dashboard Cite

The intensity and frequency of drought periods has increased according to climate change predictions. The fast overcome and recovery are important adaptive features for plant species found in regions presenting water shortage periods. Copaifera langsdorffii is a neotropical species that has developed leaves presenting physiological mechanisms and morphological adaptations that allow its survival under seasonal water stress. We aimed in this work to observe substantial physiological responses for water saving and damage representative to the photochemical reaction after exposed plants to water stress and to subsequent recovery. We found in plants mechanisms to control water loss through the lower stomatal conductance, even after rehydration. It goes against the rapid recovery of leaves, indicated by the relative water content values restored to previously unstressed plants. Stomatal conductance was the only variable presenting high plasticity index. In photochemical activity, the species presented higher photochemical quenching, electron transport rate and effective quantum yield of photosystem II when they were subjected to rehydration after water stress period. Our results suggest that C. langsdorffii presented rapid rehydration and higher photochemical efficiency even after water restriction. These data demonstrate that this species can be used as a model for physiological studies due to the adjustment developed in response to different environmental schemes.

show abstract

Challenges with Conservation Genetics and Genomics in Neotropical Forest

Siqueira,

de Moraes Silvestre,

Tambarussi

et al. 2023

Conservation Genetics in the Neotropics

View full text Add to dashboard Cite

The role of very small fragments in conserving genetic diversity of a common tree in a hyper fragmented Brazilian Atlantic forest landscape

Cited by 23 publications

References 60 publications

Reproductive phenology, seed removal and early regeneration in relation to distance from parental plants of a native palm in small Atlantic forest fragments

Reproductive phenology, seed removal and early regeneration in relation to distance from parental plants of a native palm in small Atlantic forest fragments

WATER DEFICIT ENSURES THE PHOTOCHEMICAL EFFICIENCY OF Copaifera langsdorffii Desf1

Challenges with Conservation Genetics and Genomics in Neotropical Forest

Contact Info

Product

Resources

About