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The British river of the future: how climate change and human activity might affect two contrasting river ecosystems in England
Johnston, Andrew C et al.
The possible effects of changing climate on a southern and a north-eastern English river (the Thames and the Yorkshire Ouse, respectively) were examined in relation to water and ecological quality throughout the food web. The CLASSIC hydrological model, driven by output from the Hadley Centre climate model (HadCM3), based on IPCC low and high CO2 emission scenarios for 2080 were used as the ba ...
SUBJECT: thames; ecosystems; fish; phytoplankton; freshwater
Luter, Heidi M et al.
Sponges often exhibit tissue regression in response to stressful conditions. This study investigated whether handling stress invoked tissue regression in Ianthella basta and assessed whether sponges could recover from this regressed tissue state. Six necrotic specimens and 12 healthy explants were collected at Orpheus Is. Australia and transported to aquarium facilities. Sponges were photograp ...
SUBJECT: choanocyte chambers; porifera; stress response; histology; symbiont
Whistle emissions of Indo-Pacific bottlenose dolphins (Tursiops aduncus) differ with group composition and surface behaviors
Hawkins, Elizabeth R et al.
The intricate and highly developed acoustic communication system of bottlenose dolphins reflects the complexities of their social organization. Indo-Pacific bottlenose dolphins (Tursiops aduncus) produce numerous types of acoustic emissions, including a diverse repertoire of whistles used for communicative purposes. The influence of group composition on whistle production and the function of d ...
SUBJECT: environmental sciences
Bannister, R J et al.
Symbiosis between coral reef fauna and microorganisms drives the growth, maintenance and diversity of coral reef habitats. Sponges, a key faunal component of coral reefs, form complex symbiotic relationships with microorganisms which may supply over half of their nutritional requirements through photosynthesis. The habitat distribution of the coral reef sponge Rhopaloeides odorabile correlates ...
SUBJECT: symbiosis; rhopaloeides odorabile; porifera; cyanobacteria; photosynthesis
Piddocke, Toby P et al.
This study investigates the age and growth of Lutjanus argentimaculatus at its southern (cooler) range limits in eastern Australia. Specimens were collected from New South Wales and southern Queensland between November 2011 and December 2013. Fork lengths (LF) ranged from 190 to 1019 mm, and ages ranged from 2+ to 57+ years. Growth was described by the von Bertalanffy growth function with coef ...
SUBJECT: von bertalanffy; range limits; mortality; longevity; australia
Genetic diversity and differentiation among high-latitude broadcast-spawning coral populations disjunct from the core range
Noreen, Annika ME et al.
Little is known regarding the maintenance of range-edge populations in the absence of gene flow from core populations. In this study, we used 7 microsatellite markers to investigate genetic diversity and differentiation of the broadcast-spawning coral species Acropora solitaryensis among range-edge populations that are disjunct from the core range, and cautiously infer what this means in terms ...
SUBJECT: genetic maintenance; range edge; disjunct distribution; acropora solitaryensis; environmental sciences
Characterisation of the physical and chemical properties influencing bacterial epibiont communities on benthic gelatinous egg masses of the pulmonate Siphonaria diemenensis
Peters, Casey et al.
The ability of sessile benthic egg masses to deter or prevent epibiosis is essential to the success of species that employ this life-history strategy. This study characterised the physical structure and bacterial communities on the surface of egg masses from the Siphonariid mollusc Siphonaria diemenensis (Quoy & Gaimard, 1833). Egg masses at the veliger stage of development were collected from ...
SUBJECT: antibacterial activity; bacillus psychrodurans; microscopy; epibionts; microbial fouling
Experimental restocking and seasonal visibility of a coral reef gastropod assessed by temporal modelling
Purcell, Steven W et al.
Assessing the survival of restocked marine invertebrates is complicated by crypticity and seasonal visibility of animals at release sites. We investigated local enhancement of trochus Trochus niloticus (Gastropoda) on 3 coral reefs in Western Australia. 12 000 tiny hatchery-produced juveniles, 1 to 4 mm basal shell width (BSW), were released onto each of 4 intertidal sites on each reef. Visual ...
SUBJECT: restocking; visual census; fishery; invertebrate; stock enhancement
Brown, Kathryn E et al.
The gammarid Paramoera walkeri is one of the most abundant amphipods in near-shore Antarctic waters. There has been increasing interest in P. walkeri as a test species for ecotoxicology studies and bio-monitoring for contaminants in Antarctica, but further information is needed to improve understanding of its biology including reproduction, growth and early life history. Female P. walkeri broo ...
SUBJECT: crustacean brooding; antarctica; growth; reproduction; environmental sciences
Sullivan, Caroline A et al.
SUBJECT: hydrogeology and water resources; hydrology; environmental policy; economics and law; environmental sciences