scholarly journals PHOTOPERIODISM AND THE ANNUAL TESTICULAR CYCLE OF THE BOBOLINK (DOLICHONYX ORYZIVORUS), A TRANS-EQUATORIAL MIGRANT, AS COMPARED WITH TWO TEMPERATE ZONE MIGRANTS

1961 ◽  
Vol 120 (2) ◽  
pp. 140-147 ◽  
Author(s):  
WILLIAM L. ENGELS
Keyword(s):  
Temperate Zone ◽  
Dolichonyx Oryzivorus

scholarly journals Diet of the Bobolink (Dolichonyx oryzivorus) in rice fields on its wintering grounds in Argentina

2019 ◽  
Vol 27 (1) ◽  
pp. 10-16
Author(s):  
Rodrigo E. Lorenzón ◽  
Carolina E. Antoniazzi ◽  
Franco N. Fabre ◽  
Virginia M. Quiroga ◽  
Silvia A. Regner ◽  
...  
Keyword(s):  
Stomach Contents ◽  
Rice Fields ◽  
Cultivated Plants ◽  
Relative Importance ◽  
Santa Fe ◽  
Wintering Grounds ◽  
Dolichonyx Oryzivorus ◽  
Winter Diet ◽  
Number Of Seeds ◽  
Plant Components

AbstractWinter diet of Bobolinks (Dolichonyx oryzivorus), a bird considered a pest of rice fields, is known to consist primarily of seeds. However, it is not yet possible to establish the extent to which non-rice plants and animal components contribute to its diet. To contribute to these issues, we studied the diet of the Bobolink found in rice fields on its wintering grounds in Santa Fe, Argentina, to provide information on (i) the composition of the diet and (ii) the relative importance of plant and animal components in the diet and of the different prey categories. We captured Bobolinks with mist nets and obtained samples of stomach contents by warm water and emetic-based regurgitation to determine the composition of the diet (n = 46 samples) and the importance of the different prey (n = 25 samples), mainly during March, just prior to northbound migration. We confirmed that the Bobolink’s diet in this region during this period is predominantly herbivorous (97%) and rice-based (55%), although it also consumes a large number of seeds of non-cultivated plants that represented 42% of the diet. Invertebrates, although of less importance than plant components (3%), had been consumed by 97% of captured individuais. Our results document the importance of non-cultivated plants and animal prey in the diet of Bobolinks in addition to rice.

scholarly journals Allelopathic effects of leachates of Juglans regia L., Populus tremula L. and juglone on germination of temperate zone cultivated medicinal and aromatic plants

2021 ◽  
Vol 95 (2) ◽  
pp. 431-442
Author(s):  
Péter Zubay ◽  
Jakob Kunzelmann ◽  
András Ittzés ◽  
Éva Németh Zámboriné ◽  
Krisztina Szabó
Keyword(s):  
Current Knowledge ◽  
Juglans Regia ◽  
Agroforestry Systems ◽  
Temperate Zone ◽  
Populus Tremula ◽  
Environmental Benefits ◽  
Allelopathic Effect ◽  
Aromatic Plants ◽  
Medicinal And Aromatic Plants ◽  
Allelopathic Effects

AbstractThe environmental benefits of agroforestry systems are well known. However, current knowledge of potential allelopathic interactions is inadequate. The decrease in soil fertility, the increasingly rhapsodic distribution of precipitation, and the special metabolism and cultivation of medicinal and aromatic plants are all harbingers of medicinal-agroforestry systems. The authors aimed to discover the allelopathic effects of Juglans regia L. and Populus tremula L. on germination of medicinal and aromatic plants cultivated in a temperate zone. Accordingly, an in vitro germination trial was conducted with leachates of these trees and two juglone concentrations. These allelopathic effects were evaluated for germination vigour, germination rate, and total fresh weight of seedlings of twelve different species. A pronounced species specificity was observed in tolerance of seeds and seedlings to the allelopathic effect of Populus and Juglans. In four of the species studied, the allelopathic effect may inhibit germination, but only initially. Poppy and angelica proved to be the most sensitive to the treatments. The following species had relative tolerance to the allelochemicals, so further research under natural conditions is suggested for: Althea officinalis L. (9.34 ± 5.04–68.66 ± 13.62 GR%), Anethum graveolens L. (12.00 ± 2.00–100.00 ± 6.12 GR%), Cannabis sativa L. (72.66 ± 9.02–91.34 ± 1.16 GR%), Dracocephalum moldavica L. (38.00 ± 2.00–80.00 ± 17.44 GR%), Linum usitatissimum L. (44.66 ± 2.00–58.00 ± 3.46 GR%), and Satureja hortensis L. (52.00 ± 28.22–82.00 ± 8.00 GR%). The aim would be to introduce them into agroforestry systems.

Cave visitation by temperate zone bats: effects of climatic factors

2010 ◽  
Vol 280 (4) ◽  
pp. 387-395 ◽  
Author(s):  
H. Berková ◽  
J. Zukal
Keyword(s):  
Climatic Factors ◽  
Temperate Zone
Sign in / Sign up

Export Citation Format

Share Document