scholarly journals Penetration of an area by small forest rodents

1970 ◽  
Vol 15 ◽  
pp. 209-222 ◽  
Author(s):  
Jacek Goszczyński
Keyword(s):  
Forest Rodents ◽  
Small Forest

scholarly journals Bird communities in a degraded forest biodiversity hotspot of East Africa

2021 ◽  
Author(s):  
Moses Mulwa ◽  
Mike Teucher ◽  
Werner Ulrich ◽  
Jan Christian Habel
Keyword(s):  
Tropical Forests ◽  
Agricultural Land ◽  
Bird Species ◽  
Bird Communities ◽  
Natural Forest ◽  
Tree Plantations ◽  
Agricultural Fields ◽  
Degraded Forest ◽  
Forest Patches ◽  
Small Forest

AbstractTropical forests suffer severe habitat destruction. Thus, tropical forests frequently consist today of only a few small remnants that are often embedded within a matrix of agricultural fields and tree plantations. Forest specialist species have experienced severe population declines under these circumstances. We studied bird communities based on census plots set up in a near-natural forest block, as well as degraded forest patches, tree plantations, and agricultural fields, across the Taita Hills in southern Kenya. We classified each bird species according its ecology and behavior. We quantified the land cover and landscape configuration around each census plot. Typical forest species were mainly observed in the near-natural forest block, and to a lower extent in degraded forest patches. Plantations were almost devoid of birds. Bird communities of small forest fragments were more similar to that of agricultural land than the near-natural forest block. Most frugivorous, insectivorous and nectarivorous birds occurred in forest habitats, while granivorous bird species dominated the bird communities of agricultural land. The surrounding landscape had a marginal impact on bird species composition at local sites. Our study showed that the preservation of near-natural cloud forest, including small forest patches, is essential for the conservation of forest-dependent species, and that plantations do not serve as surrogate habitats.

scholarly journals Analysis of the Offering and Resale Prices on the Second-Hand Skidders Market

Forests ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 729
Author(s):  
Mario Šporčić ◽  
Marijan Šušnjar ◽  
Zdravko Pandur ◽  
Marin Bačić ◽  
David Mijoč ◽  
...  
Keyword(s):  
Empirical Data ◽  
Working Hours ◽  
European Market ◽  
High Price ◽  
Future Trends ◽  
Sale Price ◽  
Wood Extraction ◽  
Online Marketplaces ◽  
Resale Price ◽  
Small Forest

Skidders, as self-propelled machines designed to transport trees or parts of trees by trailing or dragging it from the woods to a landing area, are still extensively used as the main wood extraction equipment in most of the Europe and worldwide. The high price of new machines (and even higher for CTL technology) makes the second-hand skidder market very interesting and appealing, especially for small forest owners and forestry contractors. So, this paper reports on a survey of used skidders available for purchase on the European market. Up-to-date empirical data was gathered by the analysis of the offerings on the main online marketplaces, i.e., specialized websites. The study included skidder make and model, variation in their age, annual usage and resale prices. The survey identified a total of 163 second-hand skidders and the results pointed out the prevalence of small-size machines (<110 kW), the average annual use (after excluding 1 year old machines from calculation) of 863 hours per year and the average re-sale price of about 65,000 EUR. Skidders are most commonly re-sold at an age of 16 years and the calculated price models show that skidder age is a stronger predictor of their value, i.e., resale price, than the total machine working hours. In the concluding section, paper also includes some reflections on possible future trends and perspectives of skidding technology in forestry.

A new species of Andean golden poison frog (Andinobates, Dendrobatidae) from the Eastern Andes of Colombia

Zootaxa ◽  
2021 ◽  
Vol 5047 (5) ◽  
pp. 531-546
Author(s):  
GIOVANNI A. CHAVES-PORTILLA ◽  
ERIKA NATHALIA SALAZAR ◽  
JOSÉ GIL-ACERO ◽  
ADRIANA DORADO-CORREA ◽  
ROBERTO MÁRQUEZ ◽  
...  
Keyword(s):  
New Species ◽  
Phylogenetic Analyses ◽  
Basic Research ◽  
Forest Fragments ◽  
New Taxon ◽  
Unique Combination ◽  
Color Patterns ◽  
Mitochondrial Markers ◽  
A New Species ◽  
Small Forest

A new species of Andinobates (Dendrobatidae) is described from the East Andes of Colombia, just 37 km away from the Colombian capital, Bogotá. Andinobates supata sp. nov., represents the second known species of yellow Andinobates, and can be distinguished from the other, Andinobates tolimensis, by an unique combination of ventral and dorsal color patterns. Our phylogenetic analyses, based on ≈ 1120 bp from two mitochondrial markers (16S rRNA and cytochrome b) showed that this new taxon is sister to a clade formed by A. cassidyhornae, A. bombetes, A. opisthomelas, A. tolimensis and A. virolinensis. The new species appears to be restricted to a handful of small forest fragments (<10 ha) distributed in no more than 5 km2, between 1800–2000 m elevation, where the human activity is high. In addition, more than 90% of the original forest has been logged at the type locality, and its watersheds receive considerable agrochemical discharges. Altogether, the evidence suggests that this new species should be listed as Critically Endangered and should receive immediate attention regarding basic research and urgent conservation measures.  

scholarly journals The persistence of ant-following birds in small amazonian forest fragments

1989 ◽  
Vol 19 (0) ◽  
pp. 249-263 ◽  
Author(s):  
Lee H. Harper
Keyword(s):  
Forest Fragments ◽  
Ant Colonies ◽  
Amazonian Forest ◽  
Army Ant ◽  
Continuous Forest ◽  
Introduced Birds ◽  
Small Forest

SUMMARYMist-net captures of army ant-following bird were monitored during the isolation of central Amazonian forest fragments of 1 ha (n = 5), 10 ha (n = 4) and 100 ha (n = 1). Post-isolation captures of the three obligate ant-following birds Dendrocinela merula, Pithys albifrons, and Gymnopithys rufigula decreased significantly in all fragments. post-isolation captures of four facultative ant-following species were not significantly different in forest fragments of 1 ha and 10 ha, although two species decreased significantly in the 100 ha fragment. Experimental introductions of obligate species into small forest fragments in the absence and presence of introduced Eciton burchelli army ant colonies resulted in significantly greater recaptures of introduced birds when active army ant colonies were present. Of the 105 birds introduced, 58 ' 55%) crossed 100-320 m od dedorested area an were recaptured in continuous forest.

Habitat structure influences refuge use by two sympatric species of Neotropical forest rodents

2018 ◽  
Vol 99 (6) ◽  
pp. 1465-1471
Author(s):  
Andrew Bretscher ◽  
Jacob W Dittel ◽  
Thomas D Lambert ◽  
Gregory H Adler
Keyword(s):  
Habitat Structure ◽  
Sympatric Species ◽  
Refuge Use ◽  
Neotropical Forest ◽  
Forest Rodents

scholarly journals Small mammals of the Kaluga region – reservoirs of dangerous zoonotic diseases

2020 ◽  
pp. 291-294
Author(s):  
Nikanorova ◽  
Kozlov
Keyword(s):  
Small Mammals ◽  
Mus Musculus ◽  
Rattus Norvegicus ◽  
Zoonotic Diseases ◽  
Myodes Glareolus ◽  
Field Mouse ◽  
Vector Borne ◽  
Kaluga Region ◽  
The City ◽  
Small Forest

The article considers the issues of carriage by small mammals of dangerous zoonotic diseases: leptospirosis, tularemia, hantaviruses. Data on the detection of antigens to pathogens in the districts of the Kaluga region are presented. As you know, small mammals are the main link in maintaining zoonotic natural focal diseases. The larval phases of ixodic ticks, mosquitoes and other parasitic arthropods prefer to feed on the blood of mouse rodents, which contributes to the spread of vector-borne infections and infestations. The following species of mouse rodents are found in the Kaluga Region: small forest mouse (Apodemus uralensis), gray vole, red vole (Myodes glareolus), field mouse (Apodemus agrarius), gray rat (Rattus norvegicus), and house mouse (Mus musculus). In natural biotopes, field species prevail in number: field mouse, gray vole, red vole. In the Kaluga region, antigens for tularemia, hantaviruses, and leptospirosis were found in small mammals in 4.9–9.4% of the studied animals on average per year. Of particular concern are the city of Kaluga, Borovsky, Babyninsky, Yukhnovsky, Ulyanovsk, Medynsky, Maloyaroslavetsky, Meshchovsky, Peremyshlsky, Kozelsky, Dzerzhinsky and Ulyanovsk districts. The data obtained indicate the stationarity of these diseases in the territory of the Kaluga region.

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