Results 51 to 60 of about 6,189 (215)
ABSTRACT Sympatric morphs provide valuable systems for studying incipient divergence despite incomplete reproductive isolation. In connected waterbodies with spatially heterogeneous habitats, one or more morphs may form metapopulation structures, generating eco‐evolutionary dynamics unlike those in single lakes.
Han Xiao +3 more
wiley +1 more source
Indigenous vegetation types of Hamilton Ecological District [PDF]
The following descriptions of indigenous vegetation types and lists of the most characteristic species have been compiled for the major landform units of the Hamilton Ecological District, which lies within the Waikato Ecological Region (McEwen 1987). The
Clarkson, Beverley R. +2 more
core +1 more source
The mechanism of the NH4 ion oscillatory transport across the excitable cell membrane [PDF]
This paper presents results on typical oscillations of the membrane potential induced by the excitation of the cell membrane by different concentrations of the NH4Cl solution.
Beljanski Miloš V. +4 more
core +1 more source
DELAYED POTASSIUM EFFECT IN NITELLA [PDF]
In normal cells of Nitella replacement of NaCl by KCl makes the P.D. much less positive: this is called the potassium effect. Cells which have lost the potassium effect usually show little or no change of P.D. when NaCl is replaced by KCl but an occasional cell responds after a delay.
S E, Hill, W J, Osterhout
openaire +2 more sources
Ergebnisse der Kartierung der Armleuchteralgen im Süden von Sachsen-Anhalt : 2. Beitrag [PDF]
Nach einer kurzen Einführung wird das Untersuchungsgebiet im Südteil von Sachsen-Anhalt umgrenzt. Bei den Untersuchungen konnten 15 Characeen-Arten nachgewiesen werden.
Korsch, Heiko
core
We investigated short‐term (1–3 years) pond biodiversity responses to restoration at a variety of management intensities. Ponds undergoing the most intense intervention (major woody vegetation and sediment removal) showed the strongest biodiversity uplift. This is likely in part due to a seedbank response and highlights the value of intense restoration
Ben Siggery +5 more
wiley +1 more source
Absence of biomagnetic effects in Nitella
The ability of N. flexilis and N. translucens to survive exposure to magnetic fields up to 1.6 T for extended periods of time was tested. Internodal cells subjected to such fields for as long as 72 h showed no evidence of damage. The active response of internodal cells was studied using an especially constructed sample chamber which allowed the use of ...
Blatt, F.J., Kuo, Y.
openaire +2 more sources
Macrophytes aquatiques dans les eaux calmes en Hesse [PDF]
Im Rahmen einer hessenweiten Untersuchung wurden etwa 70 künstliche Stillgewässer – Kiesgruben, Tagebaurestseen, Fischteiche – auf das Vorkommen von Wasserpflanzen untersucht.
Gregor, Thomas +2 more
core
Flow Resistance due to Aquatic Vegetation in Streams and Flumes
ABSTRACT Although several studies regarding flow resistance due to aquatic vegetation for small‐ and full‐scale are available, the scaling of small‐scale results to full‐scale conditions still needs to be investigated. In this paper, a theoretical flow resistance equation for open channels was tested using literature measurements performed for full ...
Alessio Nicosia +3 more
wiley +1 more source
Sedimentary macrofossil records reveal ecological change in English lakes: implications for conservation [PDF]
Aquatic macrophytes play a key role in providing habitat, refuge and food for a range of biota in shallow lakes. However, many shallow lakes have experienced declines in macrophyte vegetation in recent decades, principally due to eutrophication.
Bennion, H +10 more
core +3 more sources

