11 documents found, page 1 of 2
Not regionally extinct: rediscovery of ruppia drepanensis in Portugal, the west...
Gonçalves Frade, Duarte; Miranda Neiva, João; Martínez-Garrido, Jose; Davison, Anne; Caminiti, Luca; Ramos, Gonçalo Miguel da Cruz e Cunha GuinoteRuppia drepanensis Tineo ex Guss. is an important habitat-forming aquatic plant in saline and brackish Mediterranean wetlands. The species is declining in several parts of its range due to hydrological changes and habitat degradation. R. drepanensis was considered Critically Endangered, possibly Regionally Extinct in Portugal, due to not being observed since 1986 despite extensive surveys of suitable habitat. W...
Origin and evolutionary trajectories of brown algal sex chromosomes.
Barrera-Redondo, Josué; Lipinska, Agnieszka P.; Liu, Pengfei; Dinatale, Erica; Cossard, Guillaume; Bogaert, Kenny; Hoshino, Masakazu; Craig, Rory J.Research on the biology and evolution of sex chromosomes has primarily focused on diploid XX/XY and ZW/ZZ systems. In contrast, the rise, evolution and demise of U/V systems has remained an enigma. Here we analyse genomes of nine brown algal species with different sexual systems to determine the history of their sex determination. U/V sex chromosomes emerged between 450 and 224 million years ago, when a region ...
Rediscovery of Althenia (Potamogetonaceae) in Portugal, 168 years after the las...
Frade, Duarte; NEIVA MACHADO, JOÃO PEDRO; Anne Davison; Pearson, Gareth Anthony; Serrao, Ester A.Althenia (Potamogetonaceae) is a small genus of aquatic angiosperms from saline environments that includes the most recently evolved seagrass, Althenia marina. One or two species occur in Europe, both rare and considered Data Deficient at the regional level. We report the first records of Althenia in Portugal since 1853: two populations in the Algarve and a third in central Portugal. As in previous studies, all...
Core genes of biomineralization and cis-regulatory long non-coding RNA regulate...
Peng, Maoxiao; Cardoso, João; Pearson, Gareth Anthony; Canario, Adelino; Power, Deborah MaryBivalve molluscs are abundant in marine and freshwater systems and contribute essential ecosystem services. They are characterized by an exuberant diversity of biomineralized shells and typically have two symmetric valves (a.k.a shells), but oysters (Ostreidae), some clams (Anomiidae and Chamidae) and scallops (Pectinida) have two asymmetrical valves. Predicting and modelling the likely consequences of ocean ac...
Past and future climate effects on population structure and diversity of North ...
Tavares, Ana I; Assis, Jorge; Anderson, Laura; Raimondi, Pete; Coelho, Nelson; Paulino, Cristina; Ladah, Lydia; Nakaoka, MasahiroUnderstanding the impacts of past and future climate change on genetic diversity and structure is a current major research gap. We ask whether past range shifts explain the observed genetic diversity of surfgrass species and if future climate change projections anticipate genetic diversity losses. Our study aims to identify regions of long-term climate suitability with higher and unique seagrass genetic diversi...
Cryptic diversity in southern African kelp
Madeira, Pedro; Reddy, Maggie M.; Assis, Jorge; Bolton, John J.; Rothman, Mark D.; Anderson, Robert J.; Kandjengo, Lineekela; Kreiner, AnjaThe southern coast of Africa is one of the few places in the world where water temperatures are predicted to cool in the future. This endemism-rich coastline is home to two sister species of kelps of the genus Ecklonia maxima and Ecklonia radiata, each associated with specific thermal niches, and occuring primarily on opposite sides of the southern tip of Africa. Historical distribution records indicate that E....
Building a Portuguese coalition for biodiversity genomics
Marques, João P.; Alves, Paulo C.; Amorim, Isabel R.; Lopes, Ricardo J.; Moura, Monica; Myers, Eugene; Sim-sim, Manuela; Sousa-Santos, CarlaThe diverse physiography of the Portuguese land and marine territory, spanning from continental Europe to the Atlantic archipelagos, has made it an important repository of biodiversity throughout the Pleistocene glacial cycles, leading to a remarkable diversity of species and ecosystems. This rich biodiversity is under threat from anthropogenic drivers, such as climate change, invasive species, land use changes...
Not out of the Mediterranean: Atlantic populations of the gorgonian Paramuricea...
A. G. Coelho, Márcio; Pearson, Gareth Anthony; Boavida, Joana; Paulo, Diogo; Aurelle, Didier; ARNAUD-HAOND, Sophie; Gómez-Gras, DanielThe accurate delimitation of species boundaries in nonbilaterian marine taxa is notoriously difficult, with consequences for many studies in ecology and evolution. Anthozoans are a diverse group of key structural organisms worldwide, but the lack of reliable morphological characters and informative genetic markers hampers our ability to understand species diversification. We investigated population differentiat...
Seagrass connectivity on the west coast of Africa supports the hypothesis of gr...
Tavares, Ana I; Assis, Jorge; Patrício, A. R.; Ferreira, Rogério; Cheikh, Mohamed Ahmed Sidi; Bandeira, Salomao; Regalla, AissaPopulation connectivity influences the distribution of genetic diversity and divergence along a species range, as the likelihood of extinction or differentiation increases in isolated populations. However, there is still poor understanding of the processes mediating interpopulation dispersal in marine species that are sessile and lack planktonic life stages. One such case is the seagrass species Halodule wright...
Complete mitochondrial genome of the branching octocoral Paramuricea grayi (Joh...
Coelho, Márcio A. G.; Ledoux, Jean-Baptiste; Boavida, Joana; Paulo, Diogo; Gómez-Gras, Daniel; Bensoussan, Nathaniel; López-Sendino, PaulaThe Gray’s sea fan, Paramuricea grayi (Johnson, 1861), typically inhabits deep littoral and circalittoral habitats of the eastern temperate and tropical Atlantic Ocean. Along the Iberian Peninsula, where P. grayi is a dominant constituent of circalittoral coral gardens, two segregating lineages (yellow and purple morphotypes) were recently identified using single-copy nuclear orthologues. The mitochondrial geno...