5 documents found, page 1 of 1
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...
Past climate-driven range shifts structuring intraspecific biodiversity levels ...
Assis, Jorge; Alberto, Filipe; Macaya, Erasmo C.; Coelho, Nelson; Faugeron, Sylvain; Pearson, Gareth; Ladah, Lydia; Reed, Daniel C.; Raimondi, PeterThe paradigm of past climate-driven range shifts structuring the distribution of marine intraspecific biodiversity lacks replication in biological models exposed to comparable limiting conditions in independent regions. This may lead to confounding effects unlinked to climate drivers. We aim to fill in this gap by asking whether the global distribution of intraspecific biodiversity of giant kelp (Macrocystis py...
Cryptic diversity, geographical endemism and allopolyploidy in NE Pacific seaweeds
Neiva, J.; Serrão, Ester; Anderson, Laura; Raimondi, Peter T.; Martins, Neusa; Gouveia, Licínia; Paulino, Cristina; Coelho, Nelson C.; Miller, Kathy A.Background Molecular markers are revealing a much more diverse and evolutionarily complex picture of marine biodiversity than previously anticipated. Cryptic and/or endemic marine species are continually being found throughout the world oceans, predominantly in inconspicuous tropical groups but also in larger, canopy-forming taxa from well studied temperate regions. Interspecific hybridization has also been fou...
Egg release and settlement patterns of dioecious and hermaphroditic fucoid alga...
Ladah, Lydia; Feddersen, F.; Pearson, G. A.; Serrão, EsterThe timing of gamete release by fucoid algae, although known to be restricted to calm days is not clearly understood within a circadian time scale. The need for externally fertilizing species to avoid gamete dilution suggests that in wave-exposed areas spawning may occur during particular tidal phases. However, this may differ between mating systems, as selfing species may be less affected by gamete dilution. I...
Fertilization success and recruitment of dioecious and hermaphroditic fucoid se...
Ladah, Lydia; Bermudez, R.; Pearson, G. A.; Serrão, EsterNear its southern limit in the Northeastern Atlantic, the dioecious brown alga Fucus vesiculosus is absent from the exposed coast yet it is abundant in estuaries and coastal lagoons. In contrast, the phylogenetically and ecologically related hermaphroditic species F. sp iralis occurs along the open coast, though often in low abundance. We hypothesized that the absence of F.vesiculosus from exposed shores near i...