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2. Does the decline of red wood ants after clear-cutting favour epigeic arthropods?
- Creator:
- Żmihorski, Michał
- Type:
- article, články, model:article, and TEXT
- Subject:
- Zoologie, entomologie, Hymenoptera, Formica, predation, competition, forest management, clear-cuts, intra-guild predation, 2, and 59
- Language:
- English
- Description:
- In forest ecosystems in the temperate and boreal zones in Europe, red wood ants (RWA, Formica rufa group) have a significant affect as predators and competitors in communities of ground-dwelling arthropods. Therefore, the spatiotemporal distribution and abundance of RWA affect the distribution of many other species. The hypothesis that a reduction in the abundance of RWA in clear-cut areas enables other arthropods to increase in abundance was tested. The study was conducted in NW Poland in 2007 and 2008. A total of 276 1×1 m plots were sampled and 1,696 individuals recorded. The probability of the occurrence of RWA decreased significantly towards the center of clear-cut areas and increased with increasing plant cover. The frequency of Lasius platythorax, Formica fusca and spiders in the plots significantly increased towards the edge of a clear-cut area. Moreover, the occurrence of L. platythorax was negatively associated with the presence of RWA, while that of the Myrmica species was positively associated. The effect of the distance to the edge of a clear-cut area seems to be much more pronounced than the effect of RWA. This suggests that the arthropods studied prefer habitats close to the edge that are utilized by RWA than RWA-free sites located in the centre of clear-cut areas. and Michal Zmihorski.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3. Drought impact on ground beetle assemblages (Coleoptera, Carabidae) in Norway spruce forests with different management after windstorm damage – a case study from Tatra Mts. (Slovakia)
- Creator:
- Šustek, Zbyšek, Vido, Jaroslav, Škvareninová, Jana, Škvarenina, Jaroslav, and Šurda, Peter
- Type:
- article, model:article, and TEXT
- Subject:
- drought, ground beetle, windstorm, forest management, and Norway spruce
- Language:
- Slovak
- Description:
- After the windstorm of November 2004, the ground beetle assemblages (Coleoptera, Carabidae) differentiated after the windstorm into four groups reflecting degree of damaging and forestry management (intact stand, fallen timber in situ, extracted timber, fire). The stand with fallen timber reduced abundances of original species. Removal of timber eliminated sensitive forest species and favored tolerant species, whereas the fire allowed invasions of field species. Later, the assemblages on burned sites converged to those in the unburned sites. Their restoration has a sigmoid-like course. Independently on the above differentiation and course assemblage succession, episodes of severe drought resulted with a 1–2-years delay in sudden decline of number of individuals and species. Their numbers were restoring after longer humid periods. Because these extremes occur with a considerable regularity, the observed extremes of fluctuations of number of species and individuals represent the variability limits of the Carabid assemblages in such conditions. The Standardized Precipitation Evapotranspiration Index was shown, using the cross-correlation of SPEI and number of individuals and species of Carabids, as a suitable means to explain and predict such changes for the period of 1–2 years.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
4. Pařeziny v popředí zájmu výzkumu
- Creator:
- Radim Hédl
- Format:
- bez média and svazek
- Type:
- article, text, články, journal articles, model:article, and TEXT
- Subject:
- Biologické vědy, biologie, lesnický výzkum, ekologický výzkum, lesní hospodářství, biodiverzita, biology, forest research, ecological research, forest management, biodiversity, Česko, Czechia, pařeziny, 2, and 57/59
- Language:
- Czech
- Description:
- Radim Hédl.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
5. Pecularities of habitats of the common dormouse, Muscardinus avellanarius, within its distributional range and in Lithuania
- Creator:
- Juškaitis, Rimvydas
- Type:
- article and TEXT
- Subject:
- dormice, habitat requirements, population density, and forest management
- Language:
- English
- Description:
- On the basis of previous studies of the common dormouse Muscardinus avellanarius concentrated on deciduous woodlands in the southern counties of Great Britain, it was stated that optimal habitat for M. avellanarius should contain a high diversity of suitable shrub and tree species to provide continuous food supply through activity season and appropriate physical structure. However, both the present review of M. avellanarius habitats within its distributional range and recent dormouse studies in other parts of Great Britain indicate that M. avellanarius actually inhabits a much wider variety of habitats, and do not require specialised habitats as previously supposed. M. avellanarius habitats in Lithuania differ considerably from the optimal habitats described for this species, about 40 % of localities being situated in coniferous- dominated forests. Habitat quality may result in a very low average population density of only about one adult per hectare. However, despite of absence of optimal habitats and low population density, M. avellanarius is widespread in Lithuania, and no decline is observed in their abundance and distribution. Forest management (increasing forest cover, planting of native tree species, not too large fragmentation of forest tracts) has been favourable for M. avellanarius in Lithuania.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/
6. Pohled do českých lesů
- Creator:
- Vilém Podrázský
- Format:
- print, bez média, and svazek
- Type:
- article, články, journal articles, model:article, and TEXT
- Subject:
- Věda. Všeobecnosti. Základy vědy a kultury. Vědecká práce, lesy, semináře, lesní hospodářství, forests, seminars, forest management, 12, and 00
- Language:
- Czech
- Description:
- Tematikou lesnictví se zabýval pracovní seminář „Lesní hospodářství: aktuální problémy a rozvojová strategie“, který uspořádala Komise pro životní prostředí AV ČR 13. dubna 2016 v budově Akademie věd na Národní třídě. Pojetí semináře vycházelo z předpokladu, že lesní ekosystémy jsou základní složkou krajinného systému a lesní hospodářství je principiálním nástrojem společnosti pro jejich udržení a zvelebení. Lesnictví je přitom pod silnou společenskou kontrolou a mají na něj vliv mnohé parciální zájmy. Jde o obor s významným ekonomickým potenciálem, který se 5-8 % podílí na celostátním HDP, a to nejen lesním hospodařením, ale především prostřednictvím návazných zpracovatelských odvětví. and Vilém Podrázský.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
7. review of negative impact factors threatening mammal populations in Germany
- Creator:
- Meinig, Holger U. and Boye, Peter
- Type:
- article and TEXT
- Subject:
- conservation, forest management, agriculture, direct take, habitat destruction and fragmentation, invasive alien species, and climate change
- Language:
- English
- Description:
- Factors which have a negative impact on mammal populations were reviewed for all 83 native species occurring in Germany today. Forest management affects most species of the mammal fauna as well as of the sub-groups of Red List species and of species for which a special responsibility for their conservation has been determined in Germany. This is because a high proportion of German mammals are forest-dwelling, which means they are exposed to current harmful forestry practices such as selective harvest of ancient trees. The review also highlights population reduction by direct take of individuals (legal, illegal or accidental) and habitat fragmentation as major conservation problems affecting many species. The analysis of negative impact factors underline the importance of ongoing „traditional“ conservation measures. However, the result of climate change and invasive alien species being less important for conservation, as only few species are affected so far in Germany, is doubtful. The impacts of these two factors may be underestimated owing to a general lack of data. To ensure that conservation problems can be identified and appropriate measures are taken, the implementation of a mammal monitoring programme and specific research projects are needed. International cooperation might be helpful to overcome national shortcomings in mammal conservation in Germany and other European countries.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/