摘要:

AbstractThe phenomenon of massive algae migrations to the surface of mud flats at low tide was quantitatively investigated. Differences were noted in the behavior of the individual species. This adaptation to the tidal rhythm is obviously effective for preventing the algae from drifting to the sea, and its development can shed much light on the natural history of the species involved.Euglena obtusaandCaloneis amphisbaenavar.subsalinaapparently arose by a natural selection process among ancestors from lentic freshwater bodies, whileNavicula salinarum, Cylindrotheca signata, and several other diatoms probably invaded the freshwater habitat from marine mud flats, where they were preadapted to the tides.

ISSN:0020-9309    

DOI:10.1002/iroh.19850700112

出版商:Akademie Verlag, Berlin    

年代:1985

数据来源: WILEY

摘要:

AbstractThe Pacific deep‐sea bottoms are dominated by rhizopodan Protozoa. Their abundance on manganese nodules and in the associated sediments suggests a contribution to nodule formation, though direct evidence is still lacking. Attention is called to iron contents in solid excretion products of some sessile rhizopods that may contribute to the initiation of manganese deposition and nodule growth. Manganese is scarce in the faecal pellets of sediment‐dwelling rhizopods. This is discussed in context with questions regarding manganese mobilization in pelagic sedime

ISSN:0020-9309    

DOI:10.1002/iroh.19850700113

出版商:Akademie Verlag, Berlin    

年代:1985

数据来源: WILEY

ISSN:0020-9309    

DOI:10.1002/iroh.19850700101

出版商:Akademie Verlag, Berlin    

年代:1985

数据来源: WILEY