Filters: Tags: phenology (X)511 results (431ms)
Influences of the El Niño Southern Oscillation and the Pacific Decadal Oscillation on the timing of the North American spring
Detrended, modelled first leaf dates for 856 sites across North America for the period 1900–2008 are used to examine how the El Niño Southern Oscillation (ENSO) and the Pacific Decadal Oscillation (PDO) separately and together might influence the timing of spring. Although spring (mean March through April) ENSO and PDO signals are apparent in first leaf dates, the signals are not statistically significant (at a 95% confidence level (p < 0.05)) for most sites. The most significant ENSO/PDO signal in first leaf dates occurs for El Niño and positive PDO conditions. An analysis of the spatial distributions of first leaf dates for separate and combined ENSO/PDO conditions features a northwest–southeast dipole that is...
Twelve northern desert shrub communities having the same macroclimate but differing habitats were studies. Arranged in order of decreasing production of live stems plus current growth, the communities were: (1) Sarcobatus vermiculatus (9,172 kg/ha), (2) Grayia spinosa (7,412 kg/ha), (3) Artemisia tridentata (5,474 kg/ha), (4) Chrysothamnus nauseosus (4,836 kg/ha), (5) Atriplex confertifolia (3,194 kg/ha), (6) Eurotia lanata (2,026 kg/ha), (7) Hilaria jamesii-Atriplex confertifolia (1,995 kg/ha), (8) Atriplex corrugata (1,949 kg/ha), (9) Chrysothamnus greenii filifolius (1,866 kg/ha), (10) Atriplex nuttallii (1,309 kg/ha), (11) Elymus salinus (865 kg/ha), and (12) Tetradymia spinosa (564 kg/ha). The communities were...
Annual variation in common eider egg size: Effects of temperature, clutch size, laying date, and laying sequence
Phenology of migration and use of wintering sites by the increasing population of dark-bellied Brent geese Branta bernicla bernicla
Influence of weather factors on population build-up of pod fly, Melanagromyza obtusa Malloch, in main season pigeonpea grown under conditions of North Bihar (India)
Flowering phenology and flower predation of Cullenia exarillata (Bombacaceae) by arboreal vertebrates in Western Ghats, India
Seasonal variation in water relations of trees of differing leaf phenology in a wet-dry tropical savanna near Darwin, Northern Australia
Arrival time from spring migration in male Pied Flycatchers: Individual consistency and familial resemblance
Role of population dynamics in the development of control strategies for adult Helicoverpa zea and other Noctuidae