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001-es BibID:BIBFORM061244
Első szerző:Kolozsvári István (biológia és földrajz szakos tanár)
Cím:Javaslat a vízfolyásokon végzett odonatológiai felmérések élőhelyi háttérváltozóinak adatlapon történő egységes rögzítésére / Kolozsvári István, Jakab Tibor, Dévai György
Megjegyzések:Based on our experiences from the survey of the occurrence characteristics of riverine dragonfly larvae, exuviae and adults, it can be concluded that data suitable for comparative evaluation and real monitoring can be obtained only that case, if the data collection criteria do not change throughout the whole period of the survey. Consequently we aimed to create a natural habitat survey method in a form of a data sheet that provides opportunity to record the habitat conditions of the watercourses on a given section and in a given time. Besides the sheet code and the eight basic criteria of the biotic investigation (topographical name, geo-coordinates and UTM codes of locality; time; collector and/or observer; taxon; aim and valuation of biotic examination and form and size of study site; methods of biotic field survey), the data sheet contains 30 main observation and examination standpoints (the defining and/or influencing background variables of the living beings' occurrence), equally paying attention to the special peculiarities of the bed in the case of the water-mass, the bottom and the riverside too, as well as the biotic and abiotic factors of the sampling site. Within the main viewpoints standardization was used that covers the whole range of the given background variables, and bases of this standardization - considering the measuring person's subjective decision situation - the types can be separated with sufficient clarity. In the case of some background variables - based on our field experience till now - such indicators were registered, that allow of judgement of the given type by the weight of it's occurrence. The filling in of the data sheet can be carried out in a short time even within field circumstances. Only the particle size composition analysis of the sediment, the determination of suspended load content and the ion type of the water, furthermore the trophic state identification of the water and sediment are suggested to implement in laboratory conditions. According to our experiences so far, the recommended data sheet provides solution to the unified recordings of the site conditions and field background variables of odonatological surveys on watercourses and in long term it is appropriate for the follow up and comparison of the spatial and temporal changes.
Tárgyszavak:Természettudományok Környezettudományok magyar nyelvű folyóiratközlemény hazai lapban
data sheet
habitat survey
bed characteristics
field conditions
background variables
Megjelenés:Studia Odonatologica Hungarica. - 17 (2015), p. 85-123. -
További szerzők:Jakab Tibor Dévai György (1942-) (ökológus)
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
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