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Phenological observations on shrubs to predict weed emergence in turf
Phenology is the study of periodic biological events. If we can find easily recognizable events in common plants that precede or coincide with weed...
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Toxicity of 17α-Ethinylestradiol and Bisphenol A to the Freshwater Cnidarian Hydra vulgaris
Estrogens and estrogen mimics that enter the environment are known to present a serious threat to the development and reproduction of vertebrates by...
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The use of phenological data to calculate chilling units in Olea europaea L. in relation to the onset of reproduction
The aim of this study was to develop a practical method to evaluate the effective relationship between the amount of winter chilling and the...
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Teratogenic Effects of Amitraz, 2,4-Dimethylaniline, and Paraquat on Develo** Frog (Xenopus) Embryos
Developmental effects of amitraz (acaricide), its metabolite (2,4-dimethylaniline), and paraquat (herbicide) on embryos of a nontarget organism, Xenopu...
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Decline in size of male blue crabs (Callinectes sapidus) from 1968 to 2000 near Calvert Cliffs, Maryland
Maryland commercial landings of the blue crab ( Callinectes sapidus ) and catch per unit effort (CPUE) have remained fairly stable over the past 33 yr...
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Needle Structures and Epiphytic Microflora of Scots Pine (Pinus Sylvestris L.) under Heavy Ammonia Deposition from Fur Farming
Scots pine (Pinus sylvestris) needles from forest sites differing in distance from big fur farms emitting large amounts of ammonia and ammonium (=NH y )...
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Long-term effects of ozone on Fagus sylvatica L. — An open-top chamber exposure study
The Landesumweltamt North-Rhine Westfalia is operating eight open-top chambers as well as six reference plots at a site on a westerly exposed slope...
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Distribution of carbon in a tropical hypersaline estuary, the Casamance (Senegal, West Africa)
The Casamance estuary, on the coast of Senegal, is an inverse hypersaline estuary: salinity increases landward, and dry season salinity values are up...
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Digestive lysosome enlargement induced by experimental exposure to metals (Cu, Cd, and Zn) in mussels collected from a zinc-polluted site
This investigation was carried out to quantify changes in the structure of the digestive lysosomes of mussels, Mytilus galloprovincialis, exposed to...
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State of Determination of the Antlerogenic Tissues with Special Reference to Double-head Formation
The developmental conditions for the growth of primary cranial appendages and secondary or subsequent antlers are discussed with special regard to...
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Arthropod community organization and development in pear
Arthropod communities in pear are conceptualized as hierarchically organized systems in which several levels of organization or subsystems can be...
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Ranking introduced into phenological recording
Generally, phenological recording is based on the recognition of separate phases of development in the organism of interest. In the present study...
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Species-specific reaction of liver ultrastructure in zebrafish (Brachydanio rerio) and trout (Salmo gairdneri) after prolonged exposure to 4-chloroaniline
The morphological alterations of hepatocytes of female zebrafish, Brachydanio rerio , and fingerling rainbow trout, Salmo gairdneri , following prolonged...
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Distribution of aluminum in black spruce saplings growing on two New Brunswick forest soils with contrasting acid sulfate sorption
Two adjacent soils with contrasting sulfate sorption were examined in terms of (i) water-soluble and ion-exchangeable Al, Fe, Ca, Mg, K, Mn and Zn,...
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Methods in phenological map**
Phenological maps of flowering provide useful information about both spatial and temporal patterns of pollen emission, and their use could bring a...
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Calcium Mediation of Cytokinin-Induced Cell Division
Cytokinins are a class of plant hormones that are defined by their ability, in the presence of optimal auxin, to initiate cell division in tobacco...
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Zoid regression inSchizoporella unicornis floridana (bryozoa, cheilostomata)
In response to seasonal changes or unknown variables in laboratory cultivation, zoids of S. unicornis floridana undergo regressive changes...
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Mud shrimp (Callianassa) Larvae (Crustacea, Decapoda, Callianassidae) from Virginia Plankton
Larval stages attributed to three species of Callianassa (designated as spp. A, B and C) taken in plankton samples from the lower Chesapeake Bay are...
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Eggs, larvae, and young of the white perch,Roccus americanus, with comments on its ecology in the estuary
Eggs and larvae were reared in fresh water after strip** and fertilizing ripe ova from known brood fish found spawning in April and May in tidal...