نتایج جستجو برای: ankistrodesmus falcatus
تعداد نتایج: 198 فیلتر نتایج به سال:
Novel species of microfungi described in the present study include the following from South Africa: Cercosporella dolichandrae from Dolichandra unguiscati, Seiridium podocarpi from Podocarpus latifolius, Pseudocercospora parapseudarthriae from Pseudarthria hookeri, Neodevriesia coryneliae from Corynelia uberata on leaves of Afrocarpus falcatus, Ramichloridium eucleae from Euclea undulata and St...
Deforestation and habitat fragmentation that arise largely due to the conversion of forests to other agricultural land-use types and over-utilization of forest resources to satisfy the food and energy requirements of the increasing population are major environmental concerns in northern Ethiopia. Understanding plant species diversity and spatial distribution along environmental gradients is cru...
Deforestation and habitat fragmentation that arise largely due to the conversion of forests to other agricultural land-use types and over-utilization of forest resources to satisfy the food and energy requirements of the increasing population are major environmental concerns in northern Ethiopia. Understanding plant species diversity and spatial distribution along environmental gradients is cru...
This case is reported with the intention of highlighting the presentation of primary intestinal amoebic disease in Heckel discus Symphysodon discus. The morphology of the parasites and the pathological changes seen using light microscopy were essential. In fresh samples of intestinal content we discovered numerous amoeba-like cells. The trophozoite measures 18.6 x 10.2 mm while the cyst is 11-2...
We report a reversal in the sign of the herbivore–phytoplankton interaction between the zebra mussel (Dreissena polymorpha) and Microcystis aeruginosa, a harmful planktonic cyanobacterium. A pair of large-scale manipulations of mussel density in the same lake in consecutive years showed that when phosphorus concentrations were very low (mean total phosphorus [TP] ; 3 mg L21), the effect of Drei...
Freyinae, new subfamily, is described for a group of genera of Neotropical jumping spiders that can be distinguished from other non-ant mimic salticoid Neotropical salticids by having the following three morphological features: a slightly more elongate carapace, a distinctive prolateral tibial macrosetae arrangement (medially placed subdistal and subproximal macrosetae, with a subdorsal medial ...
به منظور بررسی مرفولوژیکی و مولکولی جمعیّتهای گونههای جنس helicotylenchus steiner, 1945 در ایران، طی سالهای 1387-1389 از نقاط مختلف ایران حدود 500 نمونه خاک و ریشه جمعآوری گردید. پس از بررسی مشخصات ریختشناسی و ریختسنجی نماتدها، با استفاده از کلیدهای شناسایی و در اکثر موارد با مراجعه مستقیم به شرحهای اصلی، جمعیتهای مورد مطالعه تعیین گونه گردید. در این مطالعه 26 گونه شامل h. abunaamai si...
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