Conversely, eddies and low-velocity runs have accumulated fine sediments because they are no longer flushed by high flows (Grams and Schmidt, 2002) and have been colonized by five of the six hydrophytes
Discerning the differences between the boundaries of the territories covered with hydrophytes
and helophytes was the most difficult problem.
In the Fall of 2001, the percentage of herbaceous plant species sampled in the reference wetland that were classified as hydrophytes
was 70%, whereas 56% of the plant species sampled in the constructed wetland were classified as hydrophytes
(Tables 1 and 5).
We delineated wetland boundaries by including all areas that appeared permanently or seasonally flooded with shallow water depths where hydrophytes
composed more than 50% of the vegetation.
Colonization by hydrophytes
is dependent not only on germination of the dormant seed bank but also on wind, water, and animal-borne seed dispersal (Galatowitsch and van der Valk 1993).
The two Marsilea species existed in marshy habitat, and Azolla pinnata (Azollaceae) occurred as a free floating hydrophyte
The first stage in the distribution of radionuclides in fresh water ecosystem is quick and intense processes of accumulation of radionuclides in the bottom sediments and hydrophytes
Because this ditch remained wet the entire growing season and because the ditch was bordered on its south side by an undisturbed, privately-owned fen/sedge meadow, this habitat boasted a very rich biodiversity of hydrophytes
The vegetation patterns are dominated by Typha dominguensis (tule); in addition to eight subdominant hydrophytes
, a total of 24 species was documented.
Initially, all had some water in a basin with identifiable hydrophytes
The soil is saturated long enough during the growing season to develop anaerobic (without oxygen) conditions that favor the growth of hydrophytes
This study concentrated on the first parameter used to define wetlands, namely the presence of hydrophytes