Theme Section Mesophotic Coral Ecosystems

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Theme Section Mesophotic Coral Ecosystems

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Author : J.C.A. Marr
language : en
Publisher:
Release Date : 2010

Theme Section Mesophotic Coral Ecosystems written by J.C.A. Marr and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.

Mesophotic Coral Ecosystems

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Author : Yossi Loya
language : en
Publisher: Springer
Release Date : 2019-05-22

Mesophotic Coral Ecosystems written by Yossi Loya and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-05-22 with Science categories.

This book summarizes what is known about mesophotic coral ecosystems (MCEs) geographically and by major taxa. MCEs are characterized by light-dependent corals and associated communities typically found at depths ranging from 30-40 m. and extending to over 150 m. in tropical and subtropical ecosystems. They are populated with organisms typically associated with shallow coral reefs, such as macroalgae, corals, sponges, and fishes, as well as specialist species unique to mesophotic depths. During the past decade, there has been an increasing scientific and management interest in MCEs expressed by the exponential increase in the number of publications studying this unique environment. Despite their close proximity to well-studied shallow reefs, and the growing evidence of their importance, our scientific knowledge of MCEs is still in its early stages. The topics covered in the book include: regional variation in MCEs; similarities and differences between mesophotic and shallow reeftaxa, biotic and abiotic conditions, biodiversity, ecology, geomorphology, and geology; potential connectivity between MCEs and shallow reefs; MCE disturbances, conservation, and management challenges; and new technologies, key research questions/knowledge gaps, priorities, and future directions in MCE research.

Theme Section On

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Author : Lara Marisa Hinderstein
language : en
Publisher:
Release Date : 2010

Theme Section On written by Lara Marisa Hinderstein and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.

Mesophotic coral ecosystems (MCEs) are characterized by the presence of light-dependent corals and associated communities that are typically found at depths ranging from 30 to 40 m and extending to over 150 m in tropical and subtropical regions. The dominant communities providing structural habitat in the mesophotic zone can be comprised of coral, sponge, and algal species. Because working in this depth range is constrained by traditional SCUBA limits, less is known about corals and associated organisms there compared to shallower coral communities. Following the first-ever gathering of international scientists to review and discuss existing knowledge of MCEs, this issue focuses on the ecological characterization, geomorphology, and concept of MCEs as refugia for shallow-water populations. The review and research papers comprising this special issue reflect the current scientific understanding of these ecosystems and the underlying mechanisms that regulate them, as well as potential resource management implications. It is important to understand the value and role of mesophotic coral ecosystems in tropical and subtropical regions as these areas face increasing environmental change and human impacts.

Theme Section On Mesophotic Coral Ecosystems

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Author : Yossi Loya
language : en
Publisher:
Release Date : 2016

Theme Section On Mesophotic Coral Ecosystems written by Yossi Loya and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.

The Second International Mesophotic Coral Ecosystems (MCEs) workshop was held in Eilat, Israel, October 26-31, 2014. Here we provide an account of: (1) advances in our knowledge of MCE ecology, including the central question of the potential vertical connectivity between MCEs and shallow-water reefs (SWRs), and that of the validity of the deep-reef refugia hypothesis (DRRH); (2) the contribution of the 2014 MCE workshop to the central question presented in (1), as well as its contribution to novel MCE studies on corals, sponges, fish, and crabs; and (3) gaps, priorities, and recommendations for future research stemming from the workshop. Despite their close proximity to well-studied SWRs, and the growing evidence of their importance, our scientific knowledge of MCEs is still in its infancy. During the last five years, we have witnessed an ever-increasing scientific interest in MCEs, expressed in the exponential increase in the number of publications studying this unique environment. The emerging consensus is that lower MCE benthic assemblages represent unique communities, either of separate species or genetically distinct individuals within species, and any significant support for the DRRH will be limited to upper MCEs. Determining the health and stability of MCEs, their biodiversity, and the degree of genetic connectivity among SWRs and MCEs, will ultimately indicate the ability of MCEs to contribute to the resilience of SWRs and help to guide future management and conservation strategies. MCEs deserve therefore management consideration in their own right. With the technological advancements taking place in recent years that facilitate access to MCEs, the prospects for exciting and innovative discoveries resulting from MCE research, spanning a wide variety of fields, are immense.

Records Of The Australian Museum

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Author :
language : en
Publisher:
Release Date : 2020

Records Of The Australian Museum written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with Natural history categories.

Mesophotic Coral Ecosystems

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Author : V. Blyth-Skyrme
language : en
Publisher:
Release Date : 2013

Mesophotic Coral Ecosystems written by V. Blyth-Skyrme and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Coral reef conservation categories.

"Mesophotic coral ecosystems (MCEs) are light-dependent communities of corals, algae, sponges, and other organisms that exist at depths between approximately 30 m to 150 m. Little known until recently and understudied relative to shallower reefs, MCEs may contain significant coral reef ecosystem resources, including both luxuriant coral reefs and diverse fish communities. Research in the Pacific Islands Region over the last few years has produced data to facilitate a better awareness of the distribution and potential significance of MCEs, but they are still relatively unknown and remain absent from most coral reef ecosystem monitoring programs and management considerations. We synthesize results of research to map the distribution of benthic habitats and communities at mesophotic depths within the region and discuss them within the context of requirement to identify and manage essential fish habitat for managed species mandated by the Magnuson-Stevens Fishery Conservation and Management Act"--Abstract.

What Are Mesophotic Coral Ecosystems

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Author : Elaine K. Baker
language : en
Publisher:
Release Date : 2016

What Are Mesophotic Coral Ecosystems written by Elaine K. Baker and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.

Ecosystem Services Provided By Mesophotic Coral Ecosystems

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Author : Daniel Holstein
language : en
Publisher:
Release Date : 2016

Ecosystem Services Provided By Mesophotic Coral Ecosystems written by Daniel Holstein and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.

Vertical Connectivity In Mesophotic Coral Ecosystems

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Author : Daniel M Holstein
language : en
Publisher:
Release Date : 2013

Vertical Connectivity In Mesophotic Coral Ecosystems written by Daniel M Holstein and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.

Mesophotic coral ecosystems (MCE) are defined as phototrophic coral habitats found deeper than 30 m. Despite being aware of these ecosystems for over 200 years, surprisingly little information is available on their ecology and biology. Recently, MCE have received renewed interest, as it appears that depth and distance from shore have the potential to buffer coral organisms from the detrimental effects of coastal development and climate change. The "deep reef refugia hypothesis" (DRRH) is an umbrella term for a collection of hypotheses concerning the role of MCE in the uncertain future of coral reefs, yet our predictions are limited by shortcomings in our understanding of some very basic effects of depth on corals and associated communities. In order to investigate the effects of depth on coral reproductive biology, sampling of Montastraea faveolata and Porites astreoides coral tissues was conducted along a depth gradient from 5 to 40 m during coral reproductive seasons in the Northern United States Virgin Islands (USVI), and observations of coral spawning and planulation were made. Samples were histologically analyzed for gamete development, reproductive activity and fecundity. Mesophotic populations of both M. faveolata and P. astreoides were reproductively active in MCE with similar gametogenic cycles to nearby shallow coral populations. There was evidence of M. faveolata split spawning in August and September at all depths, and oocyte development was delayed but more rapid in mesophotic corals. M. faveolata fecundities were significantly higher in MCE (35-40 m) than in shallow (5-10 m) sites, but the differences were not significant between mid-depth (15-22 m) and either shallow or mesophotic sites. There was no difference found in P. astreoides fecundity between mesophotic, mid-depth and shallow sites, however planulation appeared to be delayed in mesophotic colonies by 1-2 weeks. Differences in fecundity per area and coral cover between depths determine the number of propagules a unit reef will produce at different depths. In the case of M. faveolata, ova production is likely an order of magnitude greater at 35 m than at 10 m. The Connectivity Modeling System, an individual-based stochastic biophysical model of larval dispersal, parameterized with depth-specific productivity estimates and species-specific reproductive seasons and larval traits, was used to evaluate the vertical connectivity of M. faveolata and P. astreoides larvae between MCE and shallow coral habitats in the Northern USVI. Sensitivity analyses were performed to test the sensitivity of mesophotic larval subsidy into shallow habitats to depth-specific productivity, pelagic larval mortality, depth-specific fertilization rates and depth-specific post-settlement survivorship. Simulated mesophotic subsidies to shallow recruitment were found to be considerably robust, and mesophotic subsidy to shallow recruitment accounted for a greater proportion of total recruitment as shallow productivity was reduced. Even when modeled mesophotic fertilization rates and larval post-settlement survivorship were dramatically reduced, the model predicted what would likely be demographically significant mesophotic larval subsidy into shallow habitat. Mesophotic M. faveolata skeletal density, extension and calcification were estimated using micro-computed tomography. Results suggest that rates of linear extension of M. faveolata in USVI MCE may be quite fast compared to other Caribbean MCE, and that total calcification in MCE may rival shallow coral calcification. Lastly, consistencies and inconsistencies in the population connectivity of two coral and three fish constituent species in Caribbean coral reef assemblages were investigated using a nested biophysical model. Connectivity networks of coral species were more fragmented than fish, and the networks of corals and fish showed different patterns of betweenness centrality. This suggests that populations of corals and fish will likely be affected by habitat fragmentation in different ways, and that they require specific management consideration. This dissertation suggests that MCE are integral to the population connectivity of corals in the USVI and likely to wider Caribbean metapopulation connectivity as well. Further study of these highly productive ecosystems is necessary to better understand the DRRH and the role of MCE in the past, present and future of coral reefs.

Threats To Mesophotic Coral Ecosystems And Management Options

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Author : Dominic Andradi-Brown
language : en
Publisher:
Release Date : 2016

Threats To Mesophotic Coral Ecosystems And Management Options written by Dominic Andradi-Brown and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.