scholarly journals DIVERSITY OF THE BIBIONOMORPHA AND TIPULOMORPHA (DIPTERA) FROM DEAD ASH AND ASPEN WOOD IN THE FORESTS OF LITHUANIA

2021 ◽  
Vol 27 (1) ◽  
Author(s):  
Ina Gorban ◽  
Virginija Podėnienė
Keyword(s):  
Key Words ◽  
Forest Ecosystem ◽  
Dead Wood ◽  
Populus Tremula ◽  
Fraxinus Excelsior ◽  
Aspen Wood ◽  
Vast Amount ◽  
Emergence Traps ◽  
Saproxylic Species ◽  
Primary Habitat

The aim of this study was to investigate the biodiversity of nematoceran flies associated with dead wood in a forest ecosystem. Although wood is a primary habitat for a vast amount of Diptera species, no effort has previously been made to study saproxylic flies in Lithuania. During this research, emergence traps were used on aspen (Populus tremula) and ash (Fraxinus excelsior) trees in Dūkštų Ąžuolynas forest and Būda Botanical-Zoological Reserve during the period 2014–2019. In total, 672 individuals of the Bibionomorpha and Tipulomorpha collected from fallen tree trunks were identified to species. Seventy-four species represented nine families, with the Sciaridae, Anisopodidae and Mycetophilidae being most abundant. The Sciaridae family has barely studied in Lithuania and its diversity is still poorly known. During the research 23 nematoceran species, of which 19 belonging to the Sciaridae family, are first reported from Lithuania. Key words: nematoceran, saproxylic species, emergence traps.

scholarly journals Northeastern Ontario Forest Ecosystem Classification as a tool for managing marten habitat

1996 ◽  
Vol 72 (5) ◽  
pp. 529-532 ◽  
Author(s):  
J. C. Bowman ◽  
J.-F. Robitaille ◽  
W. R. Watt
Keyword(s):  
Key Words ◽  
Forest Ecosystem ◽  
Habitat Suitability ◽  
Black Spruce ◽  
Martes Americana ◽  
Forest Habitat ◽  
Site Type ◽  
Ecosystem Classification ◽  
Site Types ◽  
American Martens

In northeastern Ontario, the Forest Ecosystem Classification (NE-FEC) system has been used in a Habitat Suitability Matrix (NE-HSM) for forest wildlife. This paper examines whether American martens (Martes americana) responded significantly to different NE-FEC Site Types, and compares this response with suitability values in the NE-HSM. Use of Site Types by martens deviated significantly from availability; Site Type 5 (black spruce) was preferred and Site Type 7 (hardwood) was avoided. In general, the NE-HSM was consistent with field results; but it was concluded that some adjustments should be made to the suitability values for martens in the Northeastern Ontario Forest Habitat Suitability Matrix. Key words: Forest ecosystem classification, habitat suitability matrix, marten, Martes americana

scholarly journals Poster on Detecting and Characterizing Dead Wood Using Terrestrial Laser Scanning

2020 ◽  
Author(s):  
Tuomas Yrttimaa ◽  
Ninni Saarinen ◽  
Ville Luoma ◽  
Topi Tanhuanpää ◽  
Ville Kankare ◽  
...  
Keyword(s):  
Forest Ecosystem ◽  
Structural Component ◽  
Laser Scanning ◽  
Dead Wood ◽  
Terrestrial Laser Scanning ◽  
Automatic Method ◽  
Forest Inventories ◽  
Standing Trees ◽  
Downed Dead Wood

Dead wood is a key forest structural component for maintaining biodiversity and storing carbon. Despite its important role in a forest ecosystem, quantifying dead wood alongside standing trees has often neglected when investigating the feasibility of terrestrial laser scanning (TLS) in forest inventories. The objective of this study was therefore to develop an automatic method for detecting and characterizing downed dead wood.

Le Pic tridactyle (Picoides tridactylus): un indicateur de la qualité écologique de l'écosystème forestier du Pays-d'Enhaut (Préalpes suisses) | The Three-Toed Woodpecker (Picoides tridactylus): An Indicator of Ecological Quality in the Forest Ecosystem of the Pays-d'Enhaut Region (Swiss Prealps)

2000 ◽  
Vol 151 (8) ◽  
pp. 282-289 ◽  
Author(s):  
Pascale Derleth ◽  
Rita Bütler ◽  
Rodolphe Schlaepfer
Keyword(s):  
Sea Level ◽  
Forest Ecosystem ◽  
Dead Wood ◽  
Qualitative Evaluation ◽  
Ecological Quality ◽  
Mountain Forests ◽  
Managed Forests ◽  
Forest Reserves ◽  
European Forests ◽  
The Dead

The three-toed woodpecker (Picoides tridactylus)was first observed in the region of Pays-d'Enhaut ten years ago and is a great specialist of dead wood. This species is a suitable indicator for the quantitative and qualitative evaluation of ecological forest quality. The investigation results originating from five spruce mountain forests where the bird is present and three forests where it is assert are inventoried in the Pays-d'Enhaut region of Switzerland. The results suggest that the emergence of the woodpecker population could be due to under-management of the forest over the last forty years. The dead wood volumes in the forest with the woodpecker are similar to those of other unmanaged European forests. Forests situated above 1400 m above sea-level are recommended to be considered as ‹forest reserves›, whereas in managed forests up to an altitude of 1400 m, all trees with woodpecker's beakmarks and all snags with DBH over 30 cm should be left.

On the insect fauna of dead wood at the early stage of decay

2017 ◽  
Author(s):  
А.Э. Хумала ◽  
М.Ю. Мандельштам ◽  
Н.Б. Никитский ◽  
А.В. Полевой
Keyword(s):  
Picea Abies ◽  
Species Composition ◽  
Tree Species ◽  
Betula Pendula ◽  
Dead Wood ◽  
Early Stage ◽  
Populus Tremula ◽  
Trophic Relationships ◽  
Insect Fauna ◽  
Trunk Diameter

Мертвая древесина является основным местообитанием для огромного числа лесных видов насекомых, которые используют ее как пищу, субстрат для развития или временное убежище, одновременно участвуя в ее разложении. Видовой состав комплекса насекомых-разрушителей древесины в бореальной зоне довольно хорошо изучен, но до сих пор значительная часть типичных лесных групп представлена видами, биология и пищевая специализация которых изучены недостаточно. В 2015 г. нами исследована фауна насекомых на валеже текущего года трех пород деревьев: береза (Betula pendula), осина (Populus tremula) и ель (Picea abies x fennica). Исследования проводились в заповеднике «Кивач» (Республика Карелия) с использованием специализированных ловушек – стволовых эклекторов. В сборах идентифицировано 107 видов насекомых из 34 семейств отрядов Coleoptera, Hymenoptera и Diptera. Видовое разнообразие сильно варьировало на различных стволах, не зависело от породы и типа отпада (ветровал/бурелом), но имело тенденцию к росту с увеличением диаметра ствола. Видовой состав был довольно специфичен на всех породах, но достоверно отличался только на ели. Анализ распределения видов насекомых на стволах выявил несколько их ассоциаций как на березе, так и на ели, что позволяет говорить о совместной встречаемости некоторых видов (не связанных друг с другом прямыми трофическими связями), а возможно и о существовании более тесных связей между ними. Отмечен ряд видов, редко встречающихся в Фенноскандии, а также ранее не регистрировавшихся в Карелии. Приводится список видов, для которых удалось выявить не известные ранее особенности биологии, а также видов, находки которых интересны в фаунистическом плане. Dead wood is the main habitat for a large number of forest-dwelling insects that use it as a food source, development substrate, or temporary shelter, simultaneously contributing to its disintegration. Species composition of wood-inhabiting insects is well studied in the boreal zone, however a significant part of the typical forest-living groups is represented by species with poorly studied biology and trophic relationships. In 2015, we studied insect fauna on freshly fallen trees of birch (Betula pendula), aspen (Populus tremula) and spruce (Picea abies x fennica). The studies were conducted in the Nature Reserve Kivach (Republic of Karelia) using specially designed trunk emergence traps. Altogether, 107 species, representing 34 families of Coleoptera, Hymenoptera and Diptera were identified. Species diversity varied significantly on different trunks. It did not depend on the tree species or a type of strap (windfall/windbreak), but tended to increase with increasing trunk diameter. The species composition of insects was quite distinctive on different tree species, but differed significantly only on spruce. Analysis of the species distribution revealed several associations on birch and spruce, which suggests at least co-occurrence of some insect species (not assuming direct trophic link) and possibly existence of a closer relationships between them. The range remarkable of species has been observed, including rare representatives of Fennoscandian fauna and species not registered before in the Republic of Karelia. We provide a selective list of species with notes on previously unknown ecological peculiarities, as well as species that represent valuable faunistic findings.

Population structure and decay pattern of Phellinus tremulae in Populus tremula as determined by somatic incompatibility

1994 ◽  
Vol 72 (10) ◽  
pp. 1391-1396 ◽  
Author(s):  
L. Holmer ◽  
L. Nitare ◽  
J. Stenlid
Keyword(s):  
Population Structure ◽  
Key Words ◽  
Populus Tremula ◽  
The South ◽  
Somatic Incompatibility ◽  
The Core ◽  
Core Sequence ◽  
Route Of Infection ◽  
Decay Pattern ◽  
Fungal Dna

Isolates of the wood-decaying basidiomycete Phellinus tremulae were obtained from four different stands of aspen Populus tremula in the south of Sweden. Studies were made of somatic incompatibility among all isolated within each site. No genet could be found in more than one tree. From one stand, two trees were felled and samples were taken from stem discs every half metre up to 13 m. Eight genets were isolated from the two trees, four in each tree. Fungal DNA was amplified from five isolates representing three different genets in one tree. The core sequence of M13 was used as primer. The results agreed with those of the somatic incompatibility test. Forty-five samples were taken from small twigs from healthy-looking branches and trees, and isolates of Phellinus tremulae were obtained from three of them. The likely route of infection of Phellinus tremulae in aspen is discussed. Key words: somatic incompatibility, Phellinus tremulae, Populus tremula.

A comparison of three methods to estimate species richness of saproxylic beetles (Coleoptera) in logs and high stumps of Norway spruce

2005 ◽  
Vol 137 (3) ◽  
pp. 304-324 ◽  
Author(s):  
Lars-Ove Wikars ◽  
Erik Sahlin ◽  
Thomas Ranius
Keyword(s):  
Species Richness ◽  
Norway Spruce ◽  
Dead Wood ◽  
Growing Season ◽  
Saproxylic Beetles ◽  
Managed Forests ◽  
Forest Practices ◽  
Emergence Traps ◽  
Window Traps ◽  
The Relationship

AbstractThe amount of dead wood in forests has decreased owing to modern forest practices, and many species associated with this habitat are currently threatened. In Sweden during the last decade, naturally downed logs have been retained and, at clearcuts, high stumps have been artificially created to maintain saproxylic (dead wood dependent) insects. We tested how much these types of dead wood are used by sampling saproxylic beetles in dead wood of Norway spruce (Picea abies (L.) Karst.; Pinaceae) in managed forests in central Sweden. To analyse how surveys should be conducted in these kinds of studies, we compared three methods over an entire growing season. We found that the relationship between the type of dead wood and species richness was statistically significant when we used bark sieving and emergence traps, but not when we used window traps. It is impossible to ascertain whether beetles collected with window traps are related to the type of dead wood on which they are found and, therefore, such traps are less useful in studies of specific substrates. The yield from sieving was highest in spring and autumn, whereas species richness in window trap samples peaked in June and July and that in emergence traps peaked from May to July. With emergence traps we collected, on average, about twice the number of species over the whole season as we did by sieving on a single occasion in the spring. Both emergence trapping and sieving reveal what is present in individual pieces of dead wood, but these methods sample partly different faunas. We found fewer species on artificially created high stumps (on clearcuts); however, these stumps seem to be useful for some red-listed species.

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