Digital Commons Network^™

Exergy And Information Indices: A Comparison For Use In Structurally Dynamic Models, Brian D. Fath

International Congress on Environmental Modelling and Software

Ecosystems are open, dynamic systems changing both their structure and their function over time. A model, which is an abstraction of the system manifest at the time of its construction, can project future dynamics so long as the fundamental structure of the system does not change. A primary modelling challenge arises when the system structure changes, i.e., internal reorganization, as a result of external perturbation. Ideally, one could include algorithms in the model to anticipate such changes, but that would entail knowing a great deal more about the system and disturbances to it than is possible. Other methods to anticipate, …

Fisheries Occasional Publication No. 2 - Scientific Workshop On The Margaret River Marron, Brett Molony

Fisheries Occasional Publications

Purpose of the Workshop

To gather together and review the scientific evidence around genetic and sustainability issues necessary for the management of Margaret River Marron (MRM)

The outcomes of the day will be to provide scientific advice, options and priorities to the relevant Programs within the Department of Fisheries to promote the sustainability of marron within MR.

* Introduction to, and comparison of, genetic techniques available to researchers. Presenter - Phil Vercoe

* What do we know about the genetic diversity of marron and other Cherax? Presenter - Chris Austin

* Morphology and Hybrids Presenter - Craig Lawrence

* The …

Indirect Effect Of Habitat Destruction On Ecosystems, Nariyuki Nakagiri, K. Tainaka

International Congress on Environmental Modelling and Software

Habitat destruction is one of the primary causes of species extinction in recent history. Even if the destruction is restricted to a local and small area, its accumulation increases the risk of extinction. To study local destruction of habitat, we present a lattice ecosystem composed of prey (X) and predator (Y). This system corresponds to a lattice version of the Lotka-Volterra model, where interaction is allowed between neighboring lattice points. The lattice is partly destroyed, and destructed sites or barriers are randomly located between adjacent lattice points with the probability p. The barrier interrupts the reproduction of X, but the …

Monthly Accomplishments For Turnbull National Refuge, July 2002, Turnbull National Wildlife Refuge

Turnbull National Wildlife Refuge Reports

A monthly report of accomplishments at Turnbull National Wildlife Refuge written by Project Leader Nancy Curry.

A Vascular Flora Of Choccolocco Creek: Calhoun, Cleburne, And Talladega Counties, Alabama, Loretta Richardson Weninegar

Theses

A study of the vascular flora of the wetland species of Choccolocco Creek, its floodplain, and other sensitive areas within the Choccolocco Creek watershed was conducted from March 1994 to May 2002. The creek, which originates in the Talladega National Forest in Cleburne County, is located in northeast Alabama. It flows in a south/southwest direction along the eastern border of Calhoun County and across northern Talladega County to its confluence with Logan Martin Lake near Talladega, Alabama. The floodplain occupies 6,514.67 hectares of the watershed that consists of 97,128 hectares of land in the three county study area.

The bulk …

Parallel Characterization Of Anaerobic Toluene-And Ethylbenzene-Degrading Microbial Consortia By Pcr-Denaturing Gradient Gel Electrophoresis, Rna-Dna Membrane Hybridization, And Dna Microarray Technology, Yoshikazu Koizumi, John J. Kelly, Tatsunori Nakagawa, Hidetoshi Urakawa, Said El Fantroussi, Saleh Al-Muzaini, Manubu Fukui, Yoshikuni Urushigawa, David A. Stahl

Biology: Faculty Publications and Other Works

A mesophilic toluene-degrading consortium (TDC) and an ethylbenzene-degrading consortium (EDC) were established under sulfate-reducing conditions. These consortia were first characterized by denaturing gradient gel electrophoresis (DGGE) fingerprinting of PCR-amplified 16S rRNA gene fragments, followed by sequencing. The sequences of the major bands (T-1 and E-2) belonging to TDC and EDC, respectively, were affiliated with the family Desulfobacteriaceae. Another major band from EDC (E-1) was related to an uncultured non-sulfate-reducing soil bacterium. Oligonucleotide probes specific for the 16S rRNAs of target organisms corresponding to T-1, E-1, and E-2 were designed, and hybridization conditions were optimized for two analytical formats, membrane and …

Fine Root Vitality And Its Application In A Minirhizotron Study Of A Co2 Enrichment In A Florida Scrub Oak Ecosystem, Brandon Todd Herbert

Biological Sciences Theses & Dissertations

Minirhizotron images are assigned color codes to approximate the age of individual roots in situ. Triphenyl-tetrazolium chloride (TTC) has been used to measure the vitality of plant tissue by detecting dehydrogenase activity. TTC was used to assess the vitality of root tissue by color in a scrub oak ecosystem at Kennedy Space Center in central Florida. Roots were excavated, sorted into four color classes and stained with TTC. The product of the reduction of TTC by dehydrogenase enzyme, formazan, was extracted and its absorbance recorded using a spectrophotometer. A significant difference (p2 enrichment being conducted on a scrub oak …

Genetic Structure And Isolation By Distance In Napaea Dioica L. (Malvaceae): An Analysis Of Microsatellite Dna Variation., Jonathan Paul Wenger

Theses and Dissertations

Napaea dioica L. (Malvaceae) is a robust, dioecious perennial flowering plant that is endemic to the upper midwestem United States. Occurring exclusively on the floodplains o f small rivers, populations o f N. dioica are distributed discretely on a network o f riparian habitat throughout its range which is coincident with the southernmost margin o f the Wisconsinan continental glacier. Ten population o f N. dioica were sampled across the species geographic range and were assayed at four high resolution microsatellite marker loci to assess genetic diversity and population structure in relation to the riparian habitat network and the ecological …

The Future Of Stock Enhancements: Lessons For Hatchery Practice From Conservation Biology, Culum Brown, Rachel L. Day

Aquaculture Collection

The world’s fish species are under threat from habitat degradation and over-exploitation. In many instances, attempts to bolster stocks have been made by rearing fish in hatcheries and releasing them into the wild. Fisheries restocking programmes have primarily headed these attempts. However, a substantial number of endangered species recovery programmes also rely on the release of hatchery-reared individuals to ensure long-term population viability. Fisheries scientists have known about the behavioural deficits displayed by hatchery-reared fish and the resultant poor survival rates in the wild for over a century. Whilst there remain considerable gaps in our knowledge about the exact causes …

Biological Synopsis Of The Black Bream, Acanthopagrus Butcheri (Munro) (Teleostei: Sparidae) In Western Australia With Reference To Information From Other Southern States, Jeffrey V. Norriss, J E. Tregonning, Rod C J Lenanton, Gavin A. Sarre

Fisheries Research Reports

This synopsis presents a review of the literature and research to April 2001on the biology of black bream, Acanthopagrus butcheri (Sparidae), particularly in relation to Western Australian populations. A. butcheri is a commercially and recreationally important species, and is endemic to the coastal lakes, estuaries, river systems and sheltered coastal waters of southern Australia, including Tasmania. Separate stocks reside within each river/estuarine system in southwestern Australia, and there is considerable variation in feeding, growth rates and age at maturity among stocks. For rivers/estuaries that are seasonally flushed in winter, downstream movement with the flush is followed by the annual upstream …