Phylogenic Adaptation of Aquatic Weeds

Current Status of Aquatic Weeds and Their Management in India

Aquatic weeds pose several problems in India. The canals of Chambal commanded area in Rajasthan and Madhya Pradesh and Bhakra-Nagal in Himachal Pradesh and Punjab have been greatly slowed by the aquatic weeds. Several irrigation and hydroelectric projects in the country like Tungabhadra project in Karnataka, Nagarjuna Sagar project in Andhra Pradesh and Kakki and Idikki reservoirs in Kerala are...

Sigmund Freud on phylogenic memory

It is a widespread misconception that Sigmund Freud talks of phylogenic heritage only in his late work Der Mann Moses und die monotheistische Religion [1937], where he deals with collective Jewish identity. Striking remarks can already be found in Das Ich und das Es [1923] (which starts his second topography), but the idea already surfaces during the period of his first topography in Das Unbewu...

Microbial agents for control of aquatic weeds and their role in integrated management

Aquatic ecosystems throughout the world are threatened by the presence of invasive aquatic plants, both floating and submerged. Some of the aquatic species, such as water hyacinth (Eichhornia crassipes [Mart.] Solms), alligator weed, Alternanthera philoxeroides (Mart.), giant salvinia, Salvinia molesta D.S. Mitchell and water lettuce (Pistia stratiotes L.), Griseb. despite being relatively mino...

Phylogenic Reconstruction Then and Now

Effect of Aquatic Weeds on Velocity Profile Changes and Island Formation

The existence of aquatic weeds in waterways causes several major problems. Some of them are the obstruction of water flow and navigation, island formation, increase of water losses due to evapotranspiration, and difficulty of water arrival to canal ends. This paper aims to discuss the resulting velocity profile changes due to aquatic weeds. Also, it examines the effect of such weeds on the chan...