A5087631278- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Radioactive element chemistry and processing
- Synthesis and characterization of novel inorganic/organometallic compounds
- Crystallography and molecular interactions
- Organoboron and organosilicon chemistry
- Chemical Synthesis and Characterization
- Organometallic Complex Synthesis and Catalysis
- Organophosphorus compounds synthesis
- Lanthanide and Transition Metal Complexes
- Marine and coastal plant biology
- Marine Biology and Ecology Research
- Metal complexes synthesis and properties
- Boron and Carbon Nanomaterials Research
- Asymmetric Hydrogenation and Catalysis
- Organometallic Compounds Synthesis and Characterization
- Boron Compounds in Chemistry
- Indigenous Studies and Ecology
- Marine and fisheries research
- Advanced ceramic materials synthesis
- Crystal structures of chemical compounds
- Inorganic Fluorides and Related Compounds
- Synthesis and Reactivity of Sulfur-Containing Compounds
- Coordination Chemistry and Organometallics
- Inorganic and Organometallic Chemistry
Tennessee Technological University
2016-2024
Memorial University of Newfoundland
1993-2021
Memorial
1986-2021
Carleton University
1995-2021
University of Washington
2005-2017
University of New Mexico
2006-2016
Radiology Associates of Albuquerque
2008-2014
California State University, Long Beach
2010
Idaho National Laboratory
2009-2010
Oak Ridge National Laboratory
2007-2009
It is suggested that local animal species diversity related to the number of predators in system and their efficiency preventing single from monopolizing some important, limiting, requisite. In marine rocky intertidal this requisite usually space. Where capable monopolies are missing, or experimentally removed, systems become less diverse. On a scale, no relationship between latitude (10⚬ 49⚬ N.) was found. geographic an increased stability annual production may lead capacity for support...
Mary E. Power is a professor in the Department of Integrative Biology, University California, Berkeley, CA 94720. David Tilman Ecology, Evolution, and Behavior, Minnesota, St. Paul, MN 55108. James A. Estes wildlife biologist National Biological Service, Institute Marine Science, Santa Cruz, 95064. Bruce Menge Zoology, Oregon State University, Corvallis, OR 97331. William J. Bond doctor Botany, Cape Town, Rondebosch 7700 South Africa. L. Scott Mills an assistant Wildlife Biology Program,...
The mussel Mytilus californianus is a competitive dominant on wave—swept rocky intertidal shores. Mussel beds may exist as extensive monocultures; more often they are an everchanging mosaic of many species which inhabit wave—generated patches or gaps. This paper describes observations and experiments designed to measure the critical parameters model patch birth death, use predict spatial structure beds. Most measurements were made at Tatoosh Island, Washington, USA, from 1970—1979. Patch...
A model is developed to relate community structure level of environmental disturbance in systems which the effects are localized space and time. In general these disturbances create a pattern spatio-temporal heterogeneity by renewing limiting resource, thereby permitting utilization species that not dominant competitors. The proposed predicts frequency distribution renewed areas, with regard size age (colonization stage). thus allows one overall system local biology within compare various...
Studies of the benthos between 30 and 60 m at Cape Armitage, McMurdo Sound. Antarctica, reveal an epifaunal community in which sponges their asteroid nudibranch predators predominate. Field experiments demonstrated that, with exception Mycale accrata, growth rates are too slow to measure one year. Mycale, however, was observed increase its mass as much 67%. Because more rapid rate, appears be potential dominant competition for substratum space, resource potentially limiting sessile species....
A series of shallow intertidal pools at Mukkaw Bay, Washington, ranging in height from −0.3 to +0.6 m had the urchin Strongylocentrotus purpuratus removed them. Subtidal rocks Friday Harbor, −7.3 −8.2 m, were either caged or fransiscanus monthly intervals. Observations rate and pattern algal succession for periods up three years showed that following an initial establishment new species, brown algae began dominate. The domination is related area’s tidal height, with most rapid lower areas...
In many space—limited systems, for instance forests, coral reefs, and mussel beds, the main biological component of spatial matrix is provided by large—bodied species. At some point during their growth these species surpass ability any single individual a predator to consume them, although they still may be overwhelmed concentrated group attacks (i.e., aphids, fungi, internal parasites). These thus through continued size threshold limiting consumers, thereby attain refuge in size. The...
The herbivorous gastropod Tegula funebralis is not highly ranked in a food preference hierarchy of its major predator, the starfish Pisaster ochraceus, and exhibits persistent broad overlap with it rocky intertidal zone at Mukkaw Bay, Washington. Observations on over 5—yr period indicate that settles high intertidally, lives there for 5—6 yr, then tends to migrate lower into contact Pisaster. lays down an annual growth line permitting be aged curve constructed. Analysis relative reproduction...
Probably in early 1967, a piscivore from South America, Cichla ocellaris , was introduced to Gatun Lake the Panama Canal Zone. As this predator population spread through lake, initial effect dramatic reductions almost all secondary consumers. These species produced, turn, second- and third-order changes at other trophic levels of ecosystem. The resulting lake community can be seen best by examining general food web. decrease numbers important planktivore Melaniris has resulted within...
Species distribution models (SDMs) are numerical tools that combine observations of species occurrence or abundance with environmental estimates. They used to gain ecological and evolutionary insights predict distributions across landscapes, ...Read More
The effects of single—species removals on community composition and overt appearance were examined in an exposed, rocky, intertidal habitat at Anawhata, New Zealand. Two experiments performed. A carnivorous starfish, Stichaster australis, was removed manually kept from a stretch shore for period 9 months (September 1968 through May 1969). This manipulation resulted the mussel Perna canaliculus extending its vertical distribution by 40% available range, decrease species richness invaded area...
Two components of natural disturbance, its local intensity and frequency beyond a threshold level, limit marine benthic alga to wave-swept shores. Transplant experiments indicate that the limited distribution is not due physiological restriction. Instead, it requires predictable annual disturbance moderate for persistence.
In the low intertidal zone at Tatoosh Island, Washington, United States, minimal estimates of primary production can vary from 0 to an average 86 kilograms wet mass per square meter year when grazing assemblage is manipulated. Highly productive annual kelps (Laminariales) replace less perennial species macroscopic grazers are reduced or absent, resulting in monodominant assemblages Alaria marginata . Experiments were repeated seven consecutive years. Increased richness makes no significant...