نتایج جستجو برای: ruderal

تعداد نتایج: 246  

Journal: :Earth 2023

The reintroduction of Eurasian beaver (Castor fiber L.) results in significant changes ecosystems. purpose this study is to assess the impact environment-forming activity C. on riparian phytocoenoses Raifa forest sector Volga-Kama State Nature Biosphere Reserve (Middle Volga region, European Russia) after reintroduction. Phytoindication methods ecological–coenotic groups and indicator values we...

2014
J. D. Berger C. Ludwig

Our understanding of within-species annual plant adaptation to rainfall gradients is fragmented. Broad-scale ecological applications of Grime's C-S-R triangle are often superficial, while detailed drought physiology tends to be narrow, focusing on elite cultivars. The former lack the detail to explain how plants respond, while the latter provide little context to investigate trade-offs among tr...

2016
Megan E. Sebasky Stephen R. Keller Douglas R. Taylor

Since the last glacial maximum (LGM), many plant and animal taxa have expanded their ranges by migration from glacial refugia. Weeds of cultivation may have followed this trend or spread globally following the expansion of agriculture or ruderal habitats associated with human-mediated disturbance. We tested whether the range expansion of the weed Silene vulgaris across Europe fit the classical ...

Journal: :Environmental biosafety research 2009
Deborah K Letourneau Joy A Hagen

Risk assessments of new insect-resistant crops will need to estimate the potential for increased weediness of wild crop relatives as a consequence of gene flow. When field experiments are precluded by containment concerns, simulation experiments can identify hazards or measure expected differences between GMOs and parental plants. To measure plant fitness consequences of wild plant protection f...

2015
Silvia Del Vecchio Irene Prisco Alicia T. R. Acosta Angela Stanisci

Coastal sandy ecosystems are increasingly being threatened by human pressure, causing loss of biodiversity, habitat degradation and landscape modifications. However, there are still very few detailed studies focussing on compositional changes in coastal dune plant communities over time. In this work, we investigated how coastal dune European Union (EU) habitats (from pioneer annual beach commun...

Journal: : 2021

Objective of the study is to research peculiarities phytogenic fields formation natural and artificial plantations shrub ruderal vegetation on coal mining waste heaps within Novovolynsk area (Ukraine). The biometric analysis growth tailings has been carried out applying forest inventory methodology, which involves laying temporary experimental areas, measuring diameter tree species at a height ...

Journal: :Botany letters 2021

Ambrosia trifida L. (giant ragweed, Asteraceae) is native to the North American continent and was introduced into Europe Asia at end of 19th century. In its range, this tall annual species common in riparian ruderal habitats also a major weed cropping systems. For nearly century, A. has been great concern U.S. for highly allergenic pollen, necessitating targeted control measures reduce impact o...

Journal: :Chemosphere 2021

Seabirds form large colonies during the reproductive period, producing substantial changes in coastal ecosystems. The present study quantifies amount of N and P deposited yellow-legged gull (Larus michahellis) Atlantic Islands Galicia National Park (AINP). Based on composition droppings, total (TN), (TP) bioavailable (Pbio) directly area occupied by colony was determined. In addition, NH3 relea...

Journal: : 2022

The expert and statistical assessment of ecological coenotic groups Southern Trans-Urals vascular plants flora has been done for A.L. Belgards coenomorphs scheme temperate forest zone European Russia. Both suggested schemes give adequate similar biotopes. proposed are identified in phytometer scales space definitely can be used regional best region is realized by combined group approach at the ...

Journal: :Mediterranean botany 2021

A revision of the alien Erigeron L. species formerly included in Conyza Less. found central-northern Iberian Peninsula is presented. close examination numerous specimens collected by authors as well voucher preserved at several herbaria has helped clarify aspects regarding this group. Four have been recognised study area: canadensis (=Conyza canadensis), E. bonariensis (=C. bonariensis), sumatr...

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