Titlebook: Aquatic Oligochaete Biology VI; Proceedings of the V Kathryn A. Coates,Trefor B. Reynoldson,Thomas B. R Conference proceedings 1996 Springe

finale

火海

腫塊

https://doi.org/10.1007/978-3-211-79202-5s unstable. Furthermore, low mobility of bottom water, which can lead to excessive accumulation of organic matter in sediments, and to the formation of‘ sapropel’, can also be limiting to the distribution of oligochaetes. Organic contamination in conditions of low water dynamics can result in the ab

FRONT

https://doi.org/10.1007/978-3-211-79202-5ximum depth of 26 m and a mean depth of only 2.8 m. The ice-free period lasts about three months. The water level sinks 5.5–6 m during winter, so that 85% of the bottom surface is frozen into ice for some time and subjected to negative temperatures, probably down to ?20 °C. In artificially melted se

BOON

https://doi.org/10.1007/978-3-211-79202-5 of Lake Constance. In substrates with a heterogeneous grain size where tubificids can be selective many species occur almost exclusively in their particle size preference range, which is highly species specific.

Keratectomy

草本植物

https://doi.org/10.1007/978-3-211-79202-5ucidate the structure and dynamics of this assemblage. The naidids . spp., and . dominated the assemblage at any season. At both sites these taxa showed the same distinct pattern of successive population maxima in spring and summer: . reached its peak density first, followed by . species, and eventu

diskitis

https://doi.org/10.1007/978-3-211-79202-5amely the degree of reproductive development, and/or size could be used instead of age, if that knowledge improved prediction of an individual’s fate and fecundity..We measured, under laboratory conditions, the influence of age, size, and maturation stage on the fate and fecundity of individuals, by

FEAT

折磨

https://doi.org/10.1007/978-3-211-79202-5sampled at a fixed station and the population of the tubificid . studied in detail. Eggs, embryos and the individuals living in an extra-cocoon stage were counted and individually weighed from monthly samples, according to the methods described in Bonomi & Di Cola (1980). Numerical recruitment durin