They represent 9% of the cryptophytes
species, or 0.6% of all the species recorded in the study area.
For instance, the solute-supported meromixis and the tendency to precipitate carbonate, even the dominance of cryptophytes
in the stable part of the water column, and are similar to the features now recognized in Laguna de Guatavita.
= November 2002 (early rainy season), Ph = phanerophyte, Ch = chamaephyte, H = hemicryptophyte, Cr = cryptophyte
and Th = therophytes.
The majority of taxa associated with Ageratina luciae-brauniae and/or Solidago albopilosa are phanerophytes (40%) or hemicryptophytes (36%); 2% are chamaephytes, 13% are cryptophytes
, and 9% are therophytes.
Other small fast-growing, edible algae, such as most cryptophyte
species, responded negatively to the nutrient and fish additions.
of Percentage Leaf size species classes Therophytes 31 39.74 Microphyll Megaphanerophytes 17 21.79 Mesophyll Nanophanerophytes 11 14.10 Nanophyll Cryptophytes
12 15.38 Macrophyll Hemicryptophytes 05 6.41 Leptophyll Chamaephytes 02 2.56 Megaphyll Aphyllous Life-form classes No.
It was found that diatoms dominated phytoplankton biomass at all times (typically 50% or more of total phytoplankton biomass) followed by green algae (20 to 30%), cyanobacteria (10 to 20%), and cryptophytes
Riverine phytoplankton, consisting mostly of small-celled cryptophytes
and diatoms (Sobczak et al., 2002; Piirsoo et al., 2007), the latter often originating in periphyton, are easily assimilated by aquatic invertebrates, especially collector-gatherers and filter feeders (Webster et al., 1999).
Finally, free-living phytoplankton, including dinoflagellates, cryptophytes
, diatoms, and prymnesiophytes, show no effect of lowered pH (within a range of ~7.0-8.5) on growth rates (Berge et al., 2010), emphasizing the lack of algal growth sensitivity to high pC[O.sub.2] exposure.
El-Ghareeb and Rezk (1989) provided evidence that therophytes acquire dominance in less saline and more sandy habitats, while cryptophytes
and chamaephytes in more saline habitats.
The vegetation, thus affected, includes shrubs, geophytes, hemi- cryptophytes
, and annuals.
We considered only the life-form categories originally proposed by Raunkiaer: phanerophytes, chamaephytes, hemicryptophytes, cryptophytes