Biomass extraction from indiviual trees measured by terrestrial laser scanning is a valuable tool for forestry and for orchard plantations to extract the economic and ecological parameters of trees. The focus of this paper is to extract the woody biovolume from laser scanned trees based on the SkelTreSkeleton, which is a skeletal structure description. State of the art research proposed skeleto...

Niche apportionment models have only been applied once to parasite communities. Only the random assortment model (RA), which indicates that species abundances are independent from each other and that interspecific competition is unimportant, provided a good fit to 3 out of 6 parasite communities investigated. The generality of this result needs to be validated, however. In this study we apply 5...

Plankton size classes of <3 mum consisting largely of unicellular cyanobacteria accounted for 15 to 40% of the total primary production and generally represented <5% of the total phototrophic plankton biovolume in three South Carolina reservoirs.

Electron microscopic morphometric techniques were used to measure accurately the cytoplasm and frustule volumes of 12 naturally occurring planktonic diatoms in the Laurentian Great Lakes. In addition, cytoplasm volumes were measured in 6 other algal species. Estimates of carbon content were then made by converting measured cytoplasm volumes to carbon biomass. From these measurements and convers...

Cattle grazing and invasion by non-native plant species are globally-ubiquitous changes occurring to plant communities that are likely to reverberate through whole food webs. We used a manipulative field experiment to quantify how arthropod community structure differed in native and non-native California grassland communities in the presence and absence of grazing. The arthropod community was s...

Tiffany, M.A., M.R. González, B.K. Swan, K.M. Reifel, J.M. Watts and S.H. Hurlbert. 2007. Phytoplankton dynamics in the Salton Sea, California, 1997-1999. Lake Reserv. Manage. 23:582-605. The dynamics of phytoplankton populations in the Salton Sea were studied over the 3-year period 1997-1999. Dinoflagellates were important components, often contributing over 80% of the total biovolume of cells...

This study describes the community of all metazoan parasites from 14 individuals of thicklip wrasse, Hemigymnus melapterus, from Lizard Island, Australia. All fish were parasitized, and 4,649 parasite individuals were found. Twenty-six parasite species were identified although only 6 species were abundant and prevalent: gnathiid isopods, the copepod Hatschekia hemigymni, the digenean Callohelmi...

The study of the interrelationship between productivity and biodiversity is a major research field in ecology. Theory predicts that if essential resources are heterogeneously distributed across a metacommunity, single species may dominate productivity in individual metacommunity patches, but a mixture of species will maximize productivity across the whole metacommunity. It also predicts that a ...

Biovolume is an important characteristic of cells that shapes the contribution of microbes to total biomass and biogeochemical cycling. Most studies of bacterial cell volumes use DAPI (4',6'-diamidino-2-phenylindole), which stains nucleic acids and therefore only a portion of the cell. We used SYPRO Ruby protein stain combined with fluorescence in situ hybridization to examine biovolumes of bac...

Environmental DNA surveys are used for screening eukaryotic diversity. However, it is unclear how quantitative this approach is and to what extent results from environmental DNA studies can be used for ecological studies requiring quantitative data. Mitochondrial cytochrome oxidase (COI) is used for species-level taxonomic studies of testate amoebae and should allow assessing the community comp...