| Title: | A spatial stream-network approach assists in managing the remnant genetic diversity of riparian forests |
| Author(s): | Rodriguez-Gonzalez PM; Garcia C; Albuquerque A; Monteiro-Henriques T; Faria C; Guimaraes JB; Mendonca D; Simoes F; Ferreira MT; Mendes A; Matos J; Almeida MH; |
| Address: | "Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade de Lisboa, Edificio Azevedo Gomes, Tapada da Ajuda, 1349-017, Lisboa, Portugal. patri@isa.ulisboa.pt. Institute of Integrative Biology, Department of Evolution, Ecology, and Behaviour, University of Liverpool, Crown Street, Liverpool, L69 7ZB, United Kingdom. Plant Biology, CIBIO/InBio, Centro de Investigacao em Biodiversidade e Recursos Geneticos, Laboratorio Associado, Universidade do Porto, Campus Agrario de Vairao, 4485-661, Vairao, Portugal. Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade de Lisboa, Edificio Azevedo Gomes, Tapada da Ajuda, 1349-017, Lisboa, Portugal. Ecofield, Monitorizacoes, Estudos e Projectos, LDA, Carcavelos, Portugal. Centro de Investigacao e Tecnologias Agroambientais e Biologicas, Universidade de Tras-os-Montes e Alto Douro, Quinta de Prados, Apartado 1013, 5000-801, Vila Real, Portugal. INIAV - Instituto Nacional de Investigacao Agraria e Veterinaria, I.P., Unidade Estrategica de Biotecnologia e Recursos Geneticos, Lisboa, Portugal. LabOr- Laboratorio de Ornitologia, ICAAM - Instituto de Ciencias Agrarias e Ambientais Mediterranicas, Universidade de Evora, 7002-554, Evora, Portugal. Centre for Ecology, Evolution and Environmental Changes - cE3c, Faculdade de Ciencias, Universidade de Lisboa, Lisboa, 1749-016, Portugal" |
| DOI: | 10.1038/s41598-019-43132-7 |
| ISSN/ISBN: | 2045-2322 (Electronic) 2045-2322 (Linking) |
| Abstract: | "Quantifying the genetic diversity of riparian trees is essential to understand their chances to survive hydroclimatic alterations and to maintain their role as foundation species modulating fluvial ecosystem processes. However, the application of suitable models that account for the specific dendritic structure of hydrographic networks is still incipient in the literature. We investigate the roles of ecological and spatial factors in driving the genetic diversity of Salix salviifolia, an Iberian endemic riparian tree, across the species latitudinal range. We applied spatial stream-network models that aptly integrate dendritic features (topology, directionality) to quantify the impacts of multiple scale factors in determining genetic diversity. Based on the drift hypothesis, we expect that genetic diversity accumulates downstream in riparian ecosystems, but life history traits (e.g. dispersal patterns) and abiotic or anthropogenic factors (e.g. drought events or hydrological alteration) might alter expected patterns. Hydrological factors explained the downstream accumulation of genetic diversity at the intermediate scale that was likely mediated by hydrochory. The models also suggested upstream gene flow within basins that likely occurred through anemophilous and entomophilous pollen and seed dispersal. Higher thermicity and summer drought were related to higher population inbreeding and individual homozygosity, respectively, suggesting that increased aridity might disrupt the connectivity and mating patterns among and within riparian populations" |
| Keywords: | "Ecology *Forests *Genetic Variation *Genetics, Population Models, Theoretical Trees/*classification/*genetics;" |
| Notes: | "MedlineRodriguez-Gonzalez, Patricia Maria Garcia, Cristina Albuquerque, Antonio Monteiro-Henriques, Tiago Faria, Carla Guimaraes, Joana B Mendonca, Diogo Simoes, Fernanda Ferreira, Maria Teresa Mendes, Ana Matos, Jose Almeida, Maria Helena eng Research Support, Non-U.S. Gov't England 2019/05/03 Sci Rep. 2019 May 1; 9(1):6741. doi: 10.1038/s41598-019-43132-7" |
