Wyniki wyszukiwania - BazTech

1

Owady zapylające w mieście

Siemaszko Mikołaj

Zieleń Miejska

|

2023

|

Nr 7-8

49--51

PL

Mimo że stwierdzenie, iż Albert Einstein jest autorem słów: Gdy zginie ostatnia pszczoła, ludziom zostaną 4 lata życia, jest nieprawdziwe pod każdym względem, to należy pamiętać, że owady są podstawą funkcjonowania większości ekosystemów lądowych. Stąd też warto dowiedzieć się, co im szkodzi i jak je chronić.

2

Rabaty bylinowe dla zapylaczy

Podstolski Wojciech

Zieleń Miejska

|

2022

|

Nr 5

32--35

PL

Rosnąca w ostatnich czasach świadomość znaczenia owadów zapylających dla stabilności zarówno środowiska naturalnego, jak i rolnictwa, które są podstawą naszego istnienia, sprawiła, że z uwagą zaczęliśmy się przyglądać sytuacji i potrzebom owadów, będących naszymi naturalnymi sprzymierzeńcami.

3

Miejskie zapylacze

Banaszak-Cibicka W.

Zieleń Miejska

|

2018

|

Nr 4

26--27

PL

Owady zapylające są niezwykle ważną grupą bezkręgowców, ponieważ umożliwiają reprodukcję wielu gatunków roślin. Istotny jest również aspekt ekonomiczny zapylania. Wartość uzyskanych w wyniku zapylenia przez owady plonów na świecie szacuje się na ponad 100 miliardów dolarów rocznie.

4

Pollination value as an ecosystem service

Majewski J.

Ekonomia i Środowisko

|

2018

|

nr 1

208--219

EN

The objective of this study is to present the issues associated with insect pollination as an environmental service. Moreover, it presents the methods of estimating the value of pollination and the results of the research into that value. Research indicates a significant value of pollination – between 153 and 167 billion dollars in the world. Depending on the estimation method, the value of plant pollination by insects may vary. The differences reach as much as several dozen percent. The discrepancies result from different understanding of the term “value”, and in the case of cultivated plants – from significant diversification of the data on the impact of pollination on the crops (available in the subject literature). The literature is dominated by research in determining the value of pollination for cultivated plants. The research into the economic value of pollination for maintaining biodiversity is conducted at a very small scale.

5

Masowe wymieranie pszczół - problem nie tylko pszczelarzy

Bargańska Ż., Namieśnik J.

Analityka : nauka i praktyka

|

2016

|

nr 1

78--80

PL

Zatrucie pszczół przez środki ochrony roślin stanowi poważny problem nie tylko dla pszczelarzy podczas hodowli tych owadów, ale również dla rolników ze względu na rolę pszczół w procesie zapylania roślin.

6

Pollination strategy of Hedysarum scoparium Fisch et Mey (Fabaceae) in a dry habitat measured with pollination effectiveness and pollinator importance

Pan C.-C., Liu L.-D., Zhao H.-L., Hou Y.-L., Zhang L.

Polish Journal of Ecology

|

2013

|

Vol. 61, nr 3

605--611

EN

Hedysarum scoparium is an important xerophyte in the desert region of north-west China and can grow well as a pioneer plant in shifting sand dunes. Flowers of H. scoparium provide late season pollen and nectar for several insect groups. Hedysarum scoparium benefits from insect pollination in order to set fruit, but it is unknown which flower-visiting insects are the most effective pollinators. In this study, we characterized the pollination effectiveness and the importance of visitors toward flowers of H. scoparium in the middle of Hexi Corridor region, China. Our observations suggest that bees were the most frequent pollinators of H. scoparium: 97% of the visits were made by bees. Individuals of three medium size bee taxa (Apis mellifera, Megachile spp., Amegilla spp.) accounted for 94% of all visits. Pollen grains deposited per visit by bees showed equal effectiveness. Of all the bee groups observed, introduced A. mellifera was potentially the most effective pollinator since it frequent visitors, and had the highest ‘importance value’ followed by Megachile spp., Amegilla spp. Visits by these medium size bees may therefore be important for ensuring H. scoparium fruits set.

7

The ecological profit in phenology and pollination of alien species Spartina alterniflora (Loisel) introduced to coastal wetlands in northern China

Shi F., Yuan Z., He K., Li J., Guo S.

Polish Journal of Ecology

|

2009

|

Vol. 57, nr 2

283-289

EN

For the plant species, effective phenology and pollination syndromes can increase viable seeds which enhance the species to colonize new areas. So the species with a suit of advantageous characteristics inherent in its reproductive ecology is critical to its dispersion. Spartina alterniflora - a perennial grass native to coastal marshes of America was introduced to China in 1979 and now it is distributed in the Tianjin coastal wetlands of northern China. Flowering phenology was examined and indicated that in northern localities, flowering initiated in mid-August and senescence occurred by the end of October. The pollen-ovule ratio was 9875 ([plus or minus]2150). Abundant pollen grains compensated for a lack of pollen viability. Pollen viability was 10% approximately when pollen released 4 hours, but stigma receptivity was above 10% when stigmas exserted 7 hours. Stigmas maintained viability longer than the period of pollen release, ensuring successful pollination. Scanning electron microscopy was used to observe stigma surface characters and pollen viability. Further investigation proved stigma adaptations to increase pollen capture and exterior pollen tube growth following pollination was beneficial to fertilization. The results suggested that flowering phenology and pollination traits are vital to pollination and production of viable seed, enabling the species to spread rapidly and succeed in new habitats of northern China.