How environmental stress affects the impacts of parasites
Article Abstract:
The ways in which environmental stress affects impacts of parasites have been studied. Often the interactions are complex the the host may be affected disproportionately and negatively or the effects of parasitism may be ameliorated. Four types of environmental stressors and their intersections with infectious diseases are discussed. Fisheries can impact populations already stressed by disease, but may lower density of a host population below the threshold for sustained transmission. Introduced species may introduce new diseases to susceptible native populations. Pollutants may help parasitism by raising host susceptibility or increasing the supply of intermediates. Habitat changes such as impounding water or development can affect intermediate host and vector populations, and the number of parasites can go up or down. Parasitism should be considered when stressors of aquatic systems are evaluated.
Publication Name: Limnology and Oceanography
Subject: Earth sciences
ISSN: 0024-3590
Year: 1999
User Contributions:
Comment about this article or add new information about this topic:
Site-specific and ontogenetic variations in nutrition of mussels (Bathymodiolus sp.) from the Lucky Strike hydrothermal vent field, Mid-Atlantic Ridge
Article Abstract:
Two metabolically distinct prokaryotic endosymbionts, methanotrophic and thiotrophic, are supported in the gills of mussels at Lucky Strike hydrothermal vent field in the Mid-Atlantic. Site-specific differences in isotopic compositions of host mussels may reflect differences in methane and sulfide availability. Large differences in mean nitrogen and carbon isotopic compositions were found in mussels collected from 2 chemically distinct vents at Lucky Strike.
Publication Name: Limnology and Oceanography
Subject: Earth sciences
ISSN: 0024-3590
Year: 1999
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Ion microprobe analysis of oxygen isotope ratios in quartz from Skye granite: healed micro-cracks, fluid flow, and hydrothermal exchange
- Abstracts: Effects of layering and anistropy on fault geometry. Discussion on a model for the structure and development of fault zones
- Abstracts: Mechanical twin sets in calcite as markers of recent collisional events in a fold-and-thrust belt: evidence from the reefal limestones of southwestern Taiwan
- Abstracts: Vertical distribution and temporal variation of marine planktonic archaea in the Gerlache Strait, Antarctica, during early spring
- Abstracts: Absorption and photosynthetic action spectra. Inorganic nitrogen acquisition in the seagrass Thalassia testudinum: development of a whole-plant nitrogen budget