Turbulent sections of the river retained high species richness, whereas tranquil reaches had significantly lower species richness in years following high and prolonged flooding, compared to a period without extreme flood events. We observed a positive correlation between bacterial production and in vivo chlorophyll a fluorescence, but there was no correlation between this parameter and bacterial abundance, possibly indicating different control mechanisms for these two parameters. In one tropical species, Cylindrospermopsis africana, akinete formation was found and described for the first time. Sök i SwePub databas Utökad sökning. Sambandet mellan artrikedom hos kärlväxter och TWI kunde förbättras ytterligare med vissa beräkningsmetoder. The results from a set of double-mating experiments, using the same populations of flour beetles, provided strong evidence that cryptic female choice is also important in generating variance in male fertilization success.
It is suggested that monitoring of species with durable fruit bodies mainly polypores is likely to be a feasible approach to obtain comparable data over time.
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Jessica Marie Alba 28 april 37 år PomonaKalifornien. Bastviken, SK, et al. Då korrelationer i artrikedom studerades användes ett dataset från boreal skog i norra Sverige. The sediments had the largest bacterial fraction, followed by epiphytic bacteria, while in the water column only a few percent of the bacteria were active. Bacterial growth was significantly enhanced in all cultures amended with phosphorus. Area was a key factor. We conclude that the presence of a second shared resource and the restricted habitat use and absence of cannibalistic consumption by 1-yr-old perch individuals are two important mechanisms to explain the discrepancy between model predictions and data.