Results 111 to 120 of about 199,293 (303)
Nordic Journal of Botany, EarlyView.Passiflora clypeophylla, an endemic species to the Guatemalan karstic forests last seen in 1889 and deemed extinct, was rediscovered in the Department of Alta Verapaz, east of Cobán. The species was known only from a single specimen hailed from the type locality, Rubel Cruz, where it has been found again. An additional location has been identified in a
J.R. Kuethe +3 more
wiley +1 more source
Taxonomic insights into Indian Rotala (Lythraceae) species with verticillate phyllotaxy
Nordic Journal of Botany, EarlyView.In an effort to resolve taxonomic complexities among Indian Rotala species with verticillate phyllotaxy, this study provides an identification key, revised nomenclature, updated morphological descriptions including SEM studies of seed coat surfaces, detailed photoplates, and notes on phenology, ecology, and distribution.
Arikrishnan Parthiban +2 more
wiley +1 more source
Introduction of Seed Accumulation Index as new approach in soil seed bank classification
تاکسونومی و بیوسیستماتیک, 2013 The purpose of this study was the introduction of seed accumulation index as a new approach in the evaluation of soil seed bank consistency in the Populus caspica in Noor reserved forest park. Sampling were made above ground vegetation at peak vegetation
Azam Noraiy +3 more
doaj
Change of the weed seed bank during the first four years of a five-course crop rotation with organic vegetables [PDF]
, 2008 In a five-course rotation with organic vegetables (white cabbage, carrot and onion) the weed seed bank was reduced the year after two continuous years with red clover, mainly because of mowing of the second year red clover.
Brandsæter, Lars Olav +2 more
core
, 2005 Various biological characteristics of weed seeds were investigated. Weed seeds differ in many aspects from those of agricultural seeds. The difference results from a centuries-long struggle against the forces of nature, and especially from human activities aimed at controlling them.
Janjić, Vojislav +3 more
openaire +1 more source
Oikos, EarlyView.Climate change increases the recurrence of drought events with strong repercussions on grassland ecosystems. While the effects of single drought events on ecosystem structure and functioning are well understood, it is largely unknown whether and how recurrent drought events modify ecosystem responses to subsequent drought.
Lena M. Müller +4 more
wiley +1 more source
Consumption of fresh and buried seed by ground beetles (Coleoptera: Carabidae)
European Journal of Entomology, 2006 Ground beetles (Carabidae: Coleoptera) are predators of the seed of herbaceous plants scattered on the ground, but prefer that of certain species. Foraging beetles encounter both freshly dispersed and seed exhumed from the soil bank.
Zdenka MARTINKOVÁ +2 more
doaj +1 more source
Brassica cover crops for weed control in organic vegetable production [PDF]
, 2005 Cover crops (or green manures) are commonly used by organic vegetable growers for soil fertility building and other benefits including weed control.
Cerrai, D. +3 more
core
Oikos, EarlyView.Grasslands, by definition, are dominated by graminoids. Nevertheless, forbs also make up a substantial part of vascular plant diversity in grasslands and are important resources of mammalian herbivores. However, forb recruitment is constrained by successful dominant graminoids, limiting access to safe sites for germination.
Gerardo Celis +5 more
wiley +1 more source
The Importance of Soil Seed Bank Function in Studies of Grassland Degradation
DiversityThe world’s grasslands are under increasing threat of degradation. Given the potential for multiple drivers of decline, precise diagnosis of degradation is best achieved by comparison with a local, sustainable grassland community.
Chao Chen +3 more
doaj +1 more source