The factors affecting hydrilla verticillata
Further details may be available for individual references in the Distribution Table Details section which can be selected by going to Generate Report. After marcophytes were transplanted into the sediment, the mesocosms were placed under natural sunlight and allowed to equilibrate for 3 weeks, after which nutrient levels were 0. Gao, H. Mokhele, B. Many genera and species of aquatic plants are distributed worldwide [ 3 , 4 ]. ML analysis and Bayesian inference produced a similar topology Fig. Johansson, L. Royle, Ecol.
Apical shoots 10 individuals per mesocosm of H. The remaining three haplotypes, A2, B2, and C2, were each present in a single population. TN was determined using an alkaline potassium persulfate digestion-UV spectrophotometric method Clesceri et al.
The worldwide distribution of Hydrilla is due to recent vicariance and dispersal events that occurred in different clades during the Pleistocene.
Therefore, we can clarify the invasive potential of hydrilla in the Americas by comparing two invasive situations: One is only the introduced lineage invading the Americas and another is all four lineages invading the Americas. This study suggests that China is most likely the central area of genetic diversity for hydrilla. Srivastava, S. Hydrilla populations can expand rapidly via various vegetative propagules, including plant fragmentation, turions and tubers [ 44 — 46 ]. TN was determined using an alkaline potassium persulfate digestion-UV spectrophotometric method Clesceri et al. Losada, M. CrossRef Google Scholar 4.
However, only occurrence data for the native range were used, and distribution ranges of different genetic lineages were not considered in these two studies. Its root is less developed than that of V.
All these analyses were performed in R 3. The two species are significantly different in growth forms: V. The mismatch distribution of the overall populations was multimodal not shownand a sudden expansion model for hydrilla was therefore rejected.
The divergence of Hydrilla was estimated to have occurred in the late Miocene, and the diversification of various clades was dated to the Pleistocene epoch.
Depending on the growth status and the synergistic effects of the enzymes, an optimum pH of 8.
based on 75 review