Benthic organic matter storage in streams: Influence of detrital
import and export, retention mechanisms, and climate.
From an analysis of the distribution of the types of detrital
quartz grains in the Pilliga Sandstone, Arditto (1980) concluded that most of the quartz grains were derived from granitic rocks, and that quartz grains sourced from low- to medium-grade regional metamorphic rocks are of secondary importance.
In the 1980s, the estuary had a grazer based food web, but with increasing macrophyte cover, the food web became detrital
based (Herdendorf et a12006).
This massive accumulation of algae and detrital
matter smothered Z.
At places, sub-angular to sub-rounded grains of detrital
quartz having numerous fractures and vacuoles are observed.
grains and crystals of pyrite were often coated with carbonate rims (Fig.
The origin of the detrital
diamonds is a geological conundrum that has stimulated scientific interest for some years, culminating in 1995 in the funding by the Project 305 Office (an agency of the Xinjiang Autonomous Regional Government) of a research project to locate diamond source rocks.
Non-diatom suspended detrital
particulates showed negligible [N.sup.15]-tracer incorporation.
Arthropod regulation of micro- and mesobiota in below ground detrital
Individual articles discuss the use of manures, human wastes, and terrestrial vegetation and aquatic macrophytes in aquaculture; detrital
and algal-based food chains in aquaculture; the role of meiofauna in marine detrital
systems; composition and nutritive values of detritus; carbon pathways in aquatic detrital
systems; production of organic fertilizers by composting; conversion of cellulosic and other organic wastes into microbial proteins; methods for determining biomass and productivity of microorganisms in detrital
food webs; the role and impact of anaerobic microbial processes in aquatic systems; trophic dynamics of particle-bound bacteria in pelagic ecosystems, functional roles of the major groups of bacteria associated with detritus; and more.
The primary texture and detrital
compositions of sandstones, sand body geometry, and architecture, ultimately controlled by depositional environment, are of decisive importance in determining the rate and pathways of fluid flow affecting the extent and distribution of early diagenetic alterations in sandstones [7-12].