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Skeletons In Confusion A Review Of Astrophorid Sponges With Dichocalthrops As Structural Megascleres Porifera Demospongiae Astrophorida
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Book Synopsis Skeletons in confusion: a review of astrophorid sponges with (dicho?)calthrops as structural megascleres (Porifera, Demospongiae, Astrophorida) by : Rob van Soest
Download or read book Skeletons in confusion: a review of astrophorid sponges with (dicho?)calthrops as structural megascleres (Porifera, Demospongiae, Astrophorida) written by Rob van Soest and published by PenSoft Publishers LTD. This book was released on 2010-11-16 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sponges usually obtain their distinct shape and structure by arrangement of mineral or organic skeletal elements (spicules, ?bers). A small group, although provided with spicules, nevertheless is incapable of developing recognizable shapes because the type of structural spicules they have (equal-length four-rayed siliceous elements called calthrops) preclude the possibility of building a cohesive skeleton. Such sponges insinuate themselves in crevices and holes, diminishing the chance of their discovery and collection. The study addresses the taxonomy and biodiversity of two globally distributed genera of these sponges, Dercitus and Calthropella, including the description of ten new species (of 38 species so far documented). The two genera appear similar in spiculation, but they differ in the types of small spicules (microscleres). This induces a discussion of their phylogeny and classi? cation: are they closely related or is it convergent evolution? No proposals are made for a rearranged classi? cation pending independent evidence from molecular studies.
Book Synopsis Climate Change, Ocean Acidification and Sponges by : José Luis Carballo
Download or read book Climate Change, Ocean Acidification and Sponges written by José Luis Carballo and published by Springer. This book was released on 2017-10-27 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: While sponges represent a very simple group of organisms, which are represented by over 8000 species, there is considerable interest in the increasing role they may play in future marine ecosystems. While we still have a comparatively limited understanding of how sponges will respond to ocean warming and acidification there is evidence that some species may have the ability to acclimate or even adapt to these stressors. This comprehensive collection of articles describes our current understanding of the impacts of ocean acidification and warming on sponges across multiple levels of biological organisation, and from the geological past to the present. With expert contributions from across the world this book represents the most up-to-date view on sponge responses to climate change. This book will be of interest to a wide audience of marine scientists and managers, who are grappling with how to manage, conserve and protect marine ecosystems.
