Islands in the Stream 2002: Exploring Underwater Oases
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Biogeography, Community Structure and Biological Habitat Types of Subtidal Reefs on the South Island West Coast, New Zealand
Biogeography, community structure and biological habitat types of subtidal reefs on the South Island West Coast, New Zealand SCIENCE FOR CONSERVATION 281 Biogeography, community structure and biological habitat types of subtidal reefs on the South Island West Coast, New Zealand Nick T. Shears SCIENCE FOR CONSERVATION 281 Published by Science & Technical Publishing Department of Conservation PO Box 10420, The Terrace Wellington 6143, New Zealand Cover: Shallow mixed turfing algal assemblage near Moeraki River, South Westland (2 m depth). Dominant species include Plocamium spp. (yellow-red), Echinothamnium sp. (dark brown), Lophurella hookeriana (green), and Glossophora kunthii (top right). Photo: N.T. Shears Science for Conservation is a scientific monograph series presenting research funded by New Zealand Department of Conservation (DOC). Manuscripts are internally and externally peer-reviewed; resulting publications are considered part of the formal international scientific literature. Individual copies are printed, and are also available from the departmental website in pdf form. Titles are listed in our catalogue on the website, refer www.doc.govt.nz under Publications, then Science & technical. © Copyright December 2007, New Zealand Department of Conservation ISSN 1173–2946 (hardcopy) ISSN 1177–9241 (web PDF) ISBN 978–0–478–14354–6 (hardcopy) ISBN 978–0–478–14355–3 (web PDF) This report was prepared for publication by Science & Technical Publishing; editing and layout by Lynette Clelland. Publication was approved by the Chief Scientist (Research, Development & Improvement Division), Department of Conservation, Wellington, New Zealand. In the interest of forest conservation, we support paperless electronic publishing. When printing, recycled paper is used wherever possible. CONTENTS Abstract 5 1. Introduction 6 2. -
Excretion of Zooplankton and Benthos
PART IV: ASSIMILAT ION EFF ICI ENCY, EGESTION, AND EXCRETION OF ZOOPLANKTON AND BENTHOS I ntroduction 203 . Assimilat ion (A) i s t he f ood absorbed f rom a n i ndividual 's digestive syst em. Assimilation efficiency (A/G) is the proportion o f co ns umption (G) actuall y ab sorbed (Sushchenya 1969 , Odum 19 71, Wetzel 1975 ) . Although the t e rm A/G i s usua lly used in reference t o i ndividual o r ga ni sms , it also can be app lied to popu lations. Ege stion i s food that is not ass imi lated by the gu t a nd whi ch is elimina ted as feces (Pe nna k 1964 ). By co n t r ast , excretion is a waste product formed from assimilated f ood a nd gener a l ly i s e l imi nated in a d i s s o l ved form. 204 . Energy f low refe r s t o the assimilat ion of a population and i s de signated a s t he s um of produ cti on (P) and r espiration (R) , i .e ., A = P + R (Sus hchenya 1969 ; Odum 1971) . The e fficiency o f energy flow in a popul ation, p ~ R , may be approx ima tely e qua l t o the a ssimi l a tion efficiency of an i nd i vidua l in t hat population (Sushchenya 1969) . However , since A/G o f t en de pends on age (Sch indler 1968, Waldbaue r 1968 , Winberg et al . -
Meiobenthos of the Discovery Bay Lagoon, Jamaica, with an Emphasis on Nematodes
Meiobenthos of the discovery Bay Lagoon, Jamaica, with an emphasis on nematodes. Edwards, Cassian The copyright of this thesis rests with the author and no quotation from it or information derived from it may be published without the prior written consent of the author For additional information about this publication click this link. https://qmro.qmul.ac.uk/jspui/handle/123456789/522 Information about this research object was correct at the time of download; we occasionally make corrections to records, please therefore check the published record when citing. For more information contact [email protected] UNIVERSITY OF LONDON SCHOOL OF BIOLOGICAL AND CHEMICAL SCIENCES Meiobenthos of The Discovery Bay Lagoon, Jamaica, with an emphasis on nematodes. Cassian Edwards A thesis submitted for the degree of Doctor of Philosophy March 2009 1 ABSTRACT Sediment granulometry, microphytobenthos and meiobenthos were investigated at five habitats (white and grey sands, backreef border, shallow and deep thalassinid ghost shrimp mounds) within the western lagoon at Discovery Bay, Jamaica. Habitats were ordinated into discrete stations based on sediment granulometry. Microphytobenthic chlorophyll-a ranged between 9.5- and 151.7 mg m -2 and was consistently highest at the grey sand habitat over three sampling occasions, but did not differ between the remaining habitats. It is suggested that the high microphytobenthic biomass in grey sands was related to upwelling of nutrient rich water from the nearby main bay, and the release and excretion of nutrients from sediments and burrowing heart urchins, respectively. Meiofauna abundance ranged from 284- to 5344 individuals 10 cm -2 and showed spatial differences depending on taxon. -
Community Ecology
Schueller 509: Lecture 12 Community ecology 1. The birds of Guam – e.g. of community interactions 2. What is a community? 3. What can we measure about whole communities? An ecology mystery story If birds on Guam are declining due to… • hunting, then bird populations will be larger on military land where hunting is strictly prohibited. • habitat loss, then the amount of land cleared should be negatively correlated with bird numbers. • competition with introduced black drongo birds, then….prediction? • ……. come up with a different hypothesis and matching prediction! $3 million/yr Why not profitable hunting instead? (Worked for the passenger pigeon: “It was the demographic nightmare of overkill and impaired reproduction. If you’re killing a species far faster than they can reproduce, the end is a mathematical certainty.” http://www.audubon.org/magazine/may-june- 2014/why-passenger-pigeon-went-extinct) Community-wide effects of loss of birds Schueller 509: Lecture 12 Community ecology 1. The birds of Guam – e.g. of community interactions 2. What is a community? 3. What can we measure about whole communities? What is an ecological community? Community Ecology • Collection of populations of different species that occupy a given area. What is a community? e.g. Microbial community of one human “YOUR SKIN HARBORS whole swarming civilizations. Your lips are a zoo teeming with well- fed creatures. In your mouth lives a microbiome so dense —that if you decided to name one organism every second (You’re Barbara, You’re Bob, You’re Brenda), you’d likely need fifty lifetimes to name them all. -
Benthic Invertebrate Bycatch from a Deep-Water Trawl Fishery, Chatham Rise, New Zealand
AQUATIC CONSERVATION: MARINE AND FRESHWATER ECOSYSTEMS, VOL. 7, 27±40 (1997) CASE STUDIES AND REVIEWS Benthic invertebrate bycatch from a deep-water trawl fishery, Chatham Rise, New Zealand P. KEITH PROBERT1, DON G. MCKNIGHT2 and SIMON L. GROVE1 1Department of Marine Science, University of Otago, PO Box 56, Dunedin, New Zealand 2National Institute of Water and Atmospheric Research Ltd, PO Box 14-901, Kilbirnie, Wellington, New Zealand ABSTRACT 1. Benthic invertebrate bycatch was collected during trawling for orange roughy (Hoplostethus atlanticus) at water depths of 662±1524 m on the northern and eastern Chatham Rise, New Zealand, in July 1994. Seventy-three trawl tows were examined, 49 from `flat' areas and 24 from two groups of `hills' (small seamounts). Benthos was recorded from 82% of all tows. 2. Some 96 benthic species were recorded including Ophiuroidea (12 spp.), Natantia (11 spp.), Asteroidea (11 spp.), Gorgonacea (11 spp.), Holothuroidea (7 spp.), and Porifera (6 spp.). 3. Cluster analysis showed the bycatch from flats and hills to differ significantly. Dominant taxa from flats were Holothuroidea, Asteroidea and Natantia; whereas taxa most commonly recorded from hills were Gorgonacea and Scleractinia. Bycatch from the two geographically separate groups of hills also differed significantly. 4. The largest bycatch volumes comprised corals from hills: Scleractinia (Goniocorella dumosa), Stylasteridae (Errina chathamensis) and Antipatharia (?Bathyplates platycaulus). Such large sessile epifauna may significantly increase the complexity of benthic habitat and trawling damage may thereby depress local biodiversity. Coral patches may require 4100 yr to recover. 5. Other environmental effects of deep-water trawling are briefly reviewed. 6. There is an urgent need to assess more fully the impact of trawling on seamount biotas and, in consequence, possible conservation measures. -
Interactions Between Organisms . and Environment
INTERACTIONS BETWEEN ORGANISMS . AND ENVIRONMENT 2·1 FUNCTIONAL RELATIONSHIPS An understanding of the relationships between an organism and its environment can be attained only when the environmental factors that can be experienced by the organism are considered. This is difficult because it is first necessary for the ecologist to have some knowledge of the neurological and physiological detection abilities of the organism. Sound, for example, should be measured with an instrument that responds to sound energy in the same way that the organism being studied does. Snow depths should be measured in a manner that reflects their effect on the animal. If six inches of snow has no more effect on an animal than three inches, a distinction between the two depths is meaningless. Six inches is not twice three inches in terms of its effect on the animal! Lower animals differ from man in their response to environmental stimuli. Color vision, for example, is characteristic of man, monkeys, apes, most birds, some domesticated animals, squirrels, and, undoubtedly, others. Deer and other wild ungulates probably detect only shades of grey. Until definite data are ob tained on the nature of color vision in an animal, any measurement based on color distinctions could be misleading. Infrared energy given off by any object warmer than absolute zero (-273°C) is detected by thermal receptors on some animals. Ticks are sensitive to infrared radiation, and pit vipers detect warm prey with thermal receptors located on the anterior dorsal portion of the skull. Man can detect different levels of infrared radiation with receptors on the skin, but they are not directional nor are they as sensitive as those of ticks and vipers. -
Ecological Characterization of Bioluminescence in Mangrove Lagoon, Salt River Bay, St. Croix, USVI
Ecological Characterization of Bioluminescence in Mangrove Lagoon, Salt River Bay, St. Croix, USVI James L. Pinckney (PI)* Dianne I. Greenfield Claudia Benitez-Nelson Richard Long Michelle Zimberlin University of South Carolina Chad S. Lane Paula Reidhaar Carmelo Tomas University of North Carolina - Wilmington Bernard Castillo Kynoch Reale-Munroe Marcia Taylor University of the Virgin Islands David Goldstein Zandy Hillis-Starr National Park Service, Salt River Bay NHP & EP 01 January 2013 – 31 December 2013 Duration: 1 year * Contact Information Marine Science Program and Department of Biological Sciences University of South Carolina Columbia, SC 29208 (803) 777-7133 phone (803) 777-4002 fax [email protected] email 1 TABLE OF CONTENTS INTRODUCTION ............................................................................................................................................... 4 BACKGROUND: BIOLUMINESCENT DINOFLAGELLATES IN CARIBBEAN WATERS ............................................... 9 PROJECT OBJECTIVES ..................................................................................................................................... 19 OBJECTIVE I. CONFIRM THE IDENTIY OF THE BIOLUMINESCENT DINOFLAGELLATE(S) AND DOMINANT PHYTOPLANKTON SPECIES IN MANGROVE LAGOON ........................................................................ 22 OBJECTIVE II. COLLECT MEASUREMENTS OF BASIC WATER QUALITY PARAMETERS (E.G., TEMPERATURE, SALINITY, DISSOLVED O2, TURBIDITY, PH, IRRADIANCE, DISSOLVED NUTRIENTS) FOR CORRELATION WITH PHYTOPLANKTON -
Bioluminescence and Fluorescence of Three Sea Pens in the North-West
bioRxiv preprint doi: https://doi.org/10.1101/2020.12.08.416396; this version posted December 9, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. Bioluminescence and fluorescence of three sea pens in the north-west Mediterranean sea Warren R Francis* 1, Ana¨ısSire de Vilar 1 1: Dept of Biology, University of Southern Denmark, Odense, Denmark Corresponding author: [email protected] Abstract Bioluminescence of Mediterranean sea pens has been known for a long time, but basic parameters such as the emission spectra are unknown. Here we examined bioluminescence in three species of Pennatulacea, Pennatula rubra, Pteroeides griseum, and Veretillum cynomorium. Following dark adaptation, all three species could easily be stimulated to produce green light. All species were also fluorescent, with bioluminescence being produced at the same sites as the fluorescence. The shape of the fluorescence spectra indicates the presence of a GFP closely associated with light production, as seen in Renilla. Our videos show that light proceeds as waves along the colony from the point of stimulation for all three species, as observed in many other octocorals. Features of their bioluminescence are strongly suggestive of a \burglar alarm" function. Introduction Bioluminescence is the production of light by living organisms, and is extremely common in the marine environment [Haddock et al., 2010, Martini et al., 2019]. Within the phylum Cnidaria, biolumiescence is widely observed among the Medusazoa (true jellyfish and kin), but also among the Octocorallia, and especially the Pennatulacea (sea pens). -
Eutrophication Assessment of the Kelegeri Lake Using Gis Technique
International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 07 | July 2019 www.irjet.net p-ISSN: 2395-0072 EUTROPHICATION ASSESSMENT OF THE KELEGERI LAKE USING GIS TECHNIQUE PREETI JAMBAGI1, Dr. S. SURESH2 1Post Graduate in Environmental Engineering, BIET College Davanagere 577004 Karnataka, India 2Associate Professor, M.tech Environmental Engineering College Davanagere 577004 Karnataka, India ---------------------------------------------------------------------***---------------------------------------------------------------------- Abstract - Water is one of the most precious resources trophic state index by identifying the physico-chemical necessary for the survival of all living organisms. Due to rapid characteristics of the lake water and estimation of rate of use of chemicals and fertilizers in agricultural, discharge of eutrophication along with creation of spatial variations using sewage and domestic activities in and around the lake Geographic Information System technique. decreases the water quality of lake. The study was carried out on the assessment of trophic state of Kelegeri Lake by using 1.1 SCOPE OF PRESENT STUDY GIS technique. A representation of the spatial distribution was developed using inverse distance weighted interpolation The water is the most fundamental element of all living method. The eutrophication level of the lake was determined organisms. Due to reckless use of chemicals in the with the help of Carlson’s scale. Based on trophic state index agricultural fields and in daily activities. Phosphorous and calculations and spatial distribution by Geographic nitrogen is the main chemical responsible for the water information system technique. The lake was found to be in quality degradation. So the study of some of the physico – oligotrophic condition in February and April, mesotrophic chemical parameters of the lake to consider whether this can condition in March. -
Ontario Benthos Biomonitoring Network
ONTARIO BENTHOS BIOMONITORING NETWORK PROTOCOL MANUAL Version 1.0 May 2004 Ontario Benthos Biomonitoring Network Protocol Manual Version 1.0 May 2004 Report prepared by: C. Jones1, K.M. Somers1, B. Craig2, and T. Reynoldson3 1Ontario Ministry of Environment, Environmental Monitoring and Reporting Branch, Biomonitoring Section, Dorset Environmental Science Centre, 1026 Bellwood Acres Road, P.O. Box 39, Dorset, ON, P0A 1E0 2Environment Canada, EMAN Coordinating Office, 867 Lakeshore Road, Burlington, ON, L7R 4A6 3Acadia Centre for Estuarine Research, Box 115 Acadia University, Wolfville, Nova Scotia, B4P 2R6 2 1 Executive Summary The main purpose of the Ontario Benthos Biomonitoring Network (OBBN) is to enable assessment of aquatic ecosystem condition using benthos as indicators of water and habitat quality. This manual is a companion to the OBBN Terms of Reference, which detail the network’s objectives, deliverables, development schedule, and implementation plan. Herein we outline recommended sampling, sample processing, and analytical procedures for the OBBN. To test whether an aquatic system has been impaired by human activity, a reference condition approach (RCA) is used to compare benthos at “test sites” (where biological condition is in question) to benthos from multiple, minimally impacted “reference sites”. Because types and abundances of benthos are determined by environmental attributes (e.g., catchment size, substrate type), a combination of catchment- and site-scale habitat characteristics are used to ensure test sites are compared to appropriate reference sites. A variety of minimally impacted sites must be sampled in order to evaluate the wide range of potential test sites in Ontario. We detail sampling and sample processing methods for lakes, streams, and wetlands. -
Monitoring and Predicting Eutrophication of Inland Waters Using Remote Sensing
Monitoring and Predicting Eutrophication of Inland Waters Using Remote Sensing Shabani Marijani Mssanzya February, 2010 Monitoring and Predicting Eutrophication of Inland Waters Using Remote Sensing by Shabani Marijani Mssanzya Thesis submitted to the International Institute for Geo-information Science and Earth Observation in partial fulfilment of the requirements for the degree of Master of Science in Geo-information Science and Earth Observation, Specialisation: Environmental Hydrology Thesis Assessment Board Chairman: Prof. Dr. Ing. Wouter Verhoef (ITC) External Examiner: Dr. M. A. Eleveld (Free University- Amsterdam) First Supervisor: Dr. Ir. Mhd. Suhyb Salama (ITC) Second Supervisor: Dr. Ir. Chris M. Mannaerts (ITC) Advisor: Ms. Wiwin Ambarwulan (ITC) INTERNATIONAL INSTITUTE FOR GEO-INFORMATION SCIENCE AND EARTH OBSERVATION ENSCHEDE, THE NETHERLANDS Disclaimer This document describes work undertaken as part of a programme of study at the International Institute for Geo-information Science and Earth Observation. All views and opinions expressed therein remain the sole responsibility of the author, and do not necessarily represent those of the institute. Abstract Inland waters are human kind assets as they serve for both economical and ecological well being; however, their existence is compromised by raising eutrophication in these water bodies’ especially toxic cyanobacteria species. Existing in-situ water quality measurements have failed to offer required temporal and spatial coverage which cope with the dynamics of water quality. Therefore, the purpose of this thesis was to use remote sensing techniques to monitor and predict eutrophication with the focus on separating cyanobacteria from other Phytoplankton species. Eutrophication in water bodies is associated with growth of Phytoplankton biomass which is easily to be detected by satellite sensors. -
Comparison of Benthos and Plankton for Waukegan Harbor Area of Concern, Illinois, and Burns Harbor-Port of Indiana Non-Area of Concern, Indiana, in 2015
Prepared in cooperation with the Illinois Department of Natural Resources and the U.S. Environmental Protection Agency-Great Lakes National Program Office Comparison of Benthos and Plankton for Waukegan Harbor Area of Concern, Illinois, and Burns Harbor-Port of Indiana Non-Area of Concern, Indiana, in 2015 Scientific Investigations Report 2017–5039 U.S. Department of the Interior U.S. Geological Survey Cover. Waukegan Harbor, Illinois, in February 2015. Comparison of Benthos and Plankton for Waukegan Harbor Area of Concern, Illinois, and Burns Harbor-Port of Indiana Non-Area of Concern, Indiana, in 2015 By Barbara C. Scudder Eikenberry, Hayley A. Templar, Daniel J. Burns, Edward G. Dobrowolski, and Kurt L. Schmude Prepared in cooperation with the Illinois Department of Natural Resources and the U.S. Environmental Protection Agency-Great Lakes National Program Office Scientific Investigations Report 2017–5039 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior RYAN K. ZINKE, Secretary U.S. Geological Survey William H. Werkheiser, Acting Director U.S. Geological Survey, Reston, Virginia: 2017 For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment—visit https://www.usgs.gov or call 1–888–ASK–USGS. For an overview of USGS information products, including maps, imagery, and publications, visit https://store.usgs.gov. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text.