Species diversity in bee flies and hover flies (Diptera: Bombyliidae and Syrphidae) in the horticultural environments of the Blue Mountains, Australia

2020 ◽  
Vol 59 (3) ◽  
pp. 561-571
Author(s):  
Alexander R Robertson ◽  
Jonathan T D Finch ◽  
Andrew D Young ◽  
Robert N Spooner‐Hart ◽  
Soraya K M Outim ◽  
...  
Keyword(s):  
Species Diversity ◽  
Blue Mountains ◽  
Hover Flies

FOREST ANT COMPOSITION AND FORAGING FOLLOWING AERIAL SPRAYING OF CARBARYL TO SUPPRESS WESTERN SPRUCE BUDWORM

1990 ◽  
Vol 122 (4) ◽  
pp. 595-606 ◽  
Author(s):  
C.F. Murphy ◽  
B.A. Croft
Keyword(s):  
Species Diversity ◽  
Spruce Budworm ◽  
Choristoneura Occidentalis ◽  
Western Spruce Budworm ◽  
Ant Foraging ◽  
Blue Mountains ◽  
Ant Predation ◽  
Foraging Rate ◽  
Aerial Spraying

AbstractAn outbreak of western spruce bud worm, Choristoneura occidentalis Freeman, in the Blue Mountains of eastern Oregon, USA, was treated with helicopter-applied carbaryl. Effects on forest ants were determined from pre- and post-spray samples taken from replicated 0.75-ha sprayed and unsprayed plots. Arboreally foraging ants were sampled with sticky drop traps placed under trees. Ground-foraging ants were sampled from food-baited boards. During 8 weeks of sampling, 13 225 ants from seven genera and 19 species were collected. Seven species were known budworm predators. After spraying, ant species diversity decreased in sprayed plots. Post-spray foraging decreased in all plots, but the decrease was more rapid and pronounced in sprayed plots. Among ground-foragers, budworm predators were clearly affected by spraying. Arboreal foragers, nearly all budworm predators, showed a significantly lower foraging rate in sprayed plots. Varying effects on different species were noted. Overall ant foraging remained depressed for at least 6 weeks after spraying, long enough for budworm development to be completed. Reduced ant predation on sparse budworm populations after spraying may contribute to budworm resurgence.

Diatoms in the Early Valdai (Weichselian) sediments in Lake Ladoga basin

2019 ◽  
pp. 225-228
Author(s):  
Anna V. Ludikova
Keyword(s):  
Species Diversity ◽  
High Energy ◽  
Lake Ladoga ◽  
Diatom Assemblages ◽  
Marine Diatoms ◽  
Selective Preservation

The pioneer diatom study of the Early Weichselian (Valdai) sediments in Lake Ladoga basin was performed. The specifics of the diatom assemblages (co-occurrence of ecologically incompatible taxa, poor species diversity, low diatom concentration and selective preservation) suggest that during the Early Weichselian time intense erosion of previously deposited marine Eemian (Mikulino) sediments prevailed, which resulted in re-deposition of marine diatoms. The sedimentation took place in high-energy environments unfavorable for diatom accumulation and preservation.

Algae of the Sefunim Cave (Israel): species diversity affected by light, humidity and rock stresses

2009 ◽  
Vol 11 (2) ◽  
pp. 99-116 ◽  
Author(s):  
O. N. Vinogradova ◽  
Eviatar Nevo ◽  
Solomon P. Wasser
Keyword(s):  
Species Diversity
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