The relative contribution of natural landscapes and human-mediated factors on the connectivity of a noxious invasive weed

Alvarado-Serrano, Diego F.; Etten, Megan Van; Chang, Shu‐Mei; Baucom, Regina S.

doi:10.1101/054122

Cited by 7 publications

(8 citation statements)

References 87 publications

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“…The genotyping analysis were processed using SNPsaurus nextRAD custom scripts (SNPsaurus, Oregon, USA) 83,84 that trimmed the reads with BBDuk (BBMap tools, https ://sourc eforg e.net/proje cts/bbmap /). Next, a de novo reference genome was created by collecting 10 million reads equally divided between the samples and excluding reads using the thresholds of 7 and 700, which have been empirically determined to produce de novo reference loci that are useful for alignment 83 .…”

Section: Methodsmentioning

confidence: 99%

The influence of anthropogenic habitat fragmentation on the genetic structure and diversity of the malaria vector Anopheles cruzii (Diptera: Culicidae)

Multini

Souza

Marrelli

et al. 2020

Sci Rep

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Fragmentation of natural environments as a result of human interference has been associated with a decrease in species richness and increase in abundance of a few species that have adapted to these environments. The Brazilian Atlantic Forest, which has been undergoing an intense process of fragmentation and deforestation caused by human-made changes to the environment, is an important hotspot for malaria transmission. The main vector of simian and human malaria in this biome is the mosquito Anopheles cruzii. Anthropogenic processes reduce the availability of natural resources at the tree canopies, An. cruzii primary habitat. As a consequence, An. cruzii moves to the border of the Atlantic Forest nearing urban areas seeking resources, increasing their contact with humans in the process. We hypothesized that different levels of anthropogenic changes to the environment can be an important factor in driving the genetic structure and diversity in An. cruzii populations. Five different hypotheses using a cross-sectional and a longitudinal design were tested to assess genetic structure in sympatric An. cruzii populations and microevolutionary processes driving these populations. Single nucleotide polymorphisms were used to assess microgeographic genetic structure in An. cruzii populations in a low-endemicity area in the city of São Paulo, Brazil. Our results show an overall weak genetic structure among the populations, indicating a high gene flow system. However, our results also pointed to the presence of significant genetic structure between sympatric An. cruzii populations collected at ground and tree-canopy habitats in the urban environment and higher genetic variation in the ground-level population. This indicates that anthropogenic modifications leading to habitat fragmentation and a higher genetic diversity and structure in ground-level populations could be driving the behavior of An. cruzii, ultimately increasing its contact with humans. Understanding how anthropogenic changes in natural areas affect An. cruzii is essential for the development of more effective mosquito control strategies and, on a broader scale, for malaria-elimination efforts in the Brazilian Atlantic Forest.

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Section: Methodsmentioning

confidence: 99%

The influence of anthropogenic habitat fragmentation on the genetic structure and diversity of the malaria vector Anopheles cruzii (Diptera: Culicidae)

Multini

Souza

Marrelli

et al. 2020

Sci Rep

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“…Agroecosystem configuration and composition may be responsible for sudden changes in ecological and evolutionary dynamics, imposing strong selective pressure and leading to new forms of pests (Altieri, 1999; Alvarado‐Serrano, Van Etten, Chang, & Baucom, 2019). This complex scenario can be accentuated in countries such as Brazil, where agriculture has rapidly intensified and expanded geographically to the Cerrado region (Brazilian savannas) in the past 50 years, compared to places where agriculture is long established (Arvor, Meirelles, Dubreuil, Bégué, & Shimabukuro, 2012; DeFries, Herold, Verchot, Macedo, & Shimabukuro, 2013).…”

Section: Introductionmentioning

confidence: 99%

Population expansion and genomic adaptation to agricultural environments of the soybean looper, Chrysodeixis includens

Silva

Cordeiro

Paiva

et al. 2020

Evolutionary Applications

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Evolutionary studies of insect pests improve our ability to anticipate problems in agricultural ecosystems, such as pest outbreaks, control failures, or expansions of the host range. Here, we investigated the mechanisms underlying the evolutionary processes behind the recent census size expansion and local adaptation of Chrysodeixis includens. First, we sequenced mitochondrial markers to conduct a phylogeographic investigation of C. includens historical processes. Then, we combined a de novo genotyping‐by‐sequencing approach with a study of agricultural landscapes to uncover recent processes of adaptation. Primarily, we found low genetic diversity across all markers and clear indications of a recent demographic expansion. We also found a lack of significant isolation by distance (IBD), and weak or absent genetic structure considering geographic locations. However, we did find initial signs of population differentiation that were associated with host plant types (i.e., soybean and cotton). Agricultural landscape attributes, including soybean crops, were significantly associated with putative markers under positive selection. Moreover, positive selection associated with host differentiation was putatively linked to digestive enzymes. This study showed how landscape composition and host plants can affect the evolutionary process of agricultural pest insects such as C. includens.

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“…However, previous studies using microsatellite markers were not able to detect an effect of forest or land cover on stingless bee gene flow, suggesting that these bees have a remarkable ability to maintain high gene flow across heterogeneous and human‐altered landscapes (Jaffé, Castilla, et al, ; Jaffé, Pope, et al, ; Landaverde‐González et al, ). Since estimates of genetic diversity and gene flow are strongly influenced by the type and number of genetic markers employed (Allendorf, ; Leroy et al, ; Lozier, ), genomic studies employing thousands of single nucleotide polymorphisms (SNPs) are needed to confirm whether stingless bees are really resilient to habitat loss and fragmentation, or whether the lack of significant isolation‐by‐resistance effects in previous studies is due to the resolution of the genetic markers employed (Alvarado‐Serrano, Van Etten, Chang, & Baucom, ; McCartney‐Melstad, Vu, & Shaffer, ).…”

Section: Introductionmentioning

confidence: 99%

Landscape genomics to the rescue of a tropical bee threatened by habitat loss and climate change

Jaffé

Veiga

Pope

et al. 2019

Evolutionary Applications

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Habitat degradation and climate change are currently threatening wild pollinators, compromising their ability to provide pollination services to wild and cultivated plants. Landscape genomics offers powerful tools to assess the influence of landscape modifications on genetic diversity and functional connectivity, and to identify adaptations to local environmental conditions that could facilitate future bee survival. Here, we assessed range‐wide patterns of genetic structure, genetic diversity, gene flow, and local adaptation in the stingless bee Melipona subnitida, a tropical pollinator of key biological and economic importance inhabiting one of the driest and hottest regions of South America. Our results reveal four genetic clusters across the species’ full distribution range. All populations were found to be under a mutation–drift equilibrium, and genetic diversity was not influenced by the amount of reminiscent natural habitats. However, genetic relatedness was spatially autocorrelated and isolation by landscape resistance explained range‐wide relatedness patterns better than isolation by geographic distance, contradicting earlier findings for stingless bees. Specifically, gene flow was enhanced by increased thermal stability, higher forest cover, lower elevations, and less corrugated terrains. Finally, we detected genomic signatures of adaptation to temperature, precipitation, and forest cover, spatially distributed in latitudinal and altitudinal patterns. Taken together, our findings shed important light on the life history of M. subnitida and highlight the role of regions with large thermal fluctuations, deforested areas, and mountain ranges as dispersal barriers. Conservation actions such as restricting long‐distance colony transportation, preserving local adaptations, and improving the connectivity between highlands and lowlands are likely to assure future pollination services.

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The relative contribution of natural landscapes and human-mediated factors on the connectivity of a noxious invasive weed

Cited by 7 publications

References 87 publications

The influence of anthropogenic habitat fragmentation on the genetic structure and diversity of the malaria vector Anopheles cruzii (Diptera: Culicidae)

The influence of anthropogenic habitat fragmentation on the genetic structure and diversity of the malaria vector Anopheles cruzii (Diptera: Culicidae)

Population expansion and genomic adaptation to agricultural environments of the soybean looper, Chrysodeixis includens

Landscape genomics to the rescue of a tropical bee threatened by habitat loss and climate change

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