scholarly journals Екологічна структура угрупувань панцирних кліщів (Acariformes, Oribatei) ділянок рекультивації м. Жовті Води Дніпропетровської області

2010 ◽  
Vol 1 (2) ◽  
pp. 101-110
Author(s):  
А. D. Shtirts ◽  
Y. L. Kul’bachko ◽  
А. V. Nikitenko ◽  
О. A. Didur
Keyword(s):  
Leaf Litter ◽  
Forest Ecosystems ◽  
Life Form ◽  
Positive Influence ◽  
Ecological Structure ◽  
Technogenic Landscapes

Taxonomical composition and ecological structure of Oribatei associates in recultivated territories  located near Zhovti Vody town are investigated. The artificial arboreal planting causes increase of oribatida number in comparison with recultivated areas without arbors. Planting of trees and presence of the leaf litter promote to redistribution of oribatida life-form and change of structure in their complexes. The positive influence of artificial forest ecosystems in technogenic landscapes of different stages of technical remediation on forming of Oribatei ecological structure is shown.

scholarly journals Effect of biochar addition on leaf-litter decomposition at soil surface during three years in a warm-temperate secondary deciduous forest, Japan

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Yukiya Minamino ◽  
Nobuhide Fujitake ◽  
Takeshi Suzuki ◽  
Shinpei Yoshitake ◽  
Hiroshi Koizumi ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Leaf Litter ◽  
Litter Decomposition ◽  
Forest Floor ◽  
Nutrient Dynamics ◽  
Forest Ecosystems ◽  
Deciduous Forest ◽  
Soil Surface ◽  
Leaf Litter Decomposition ◽  
Dry Conditions

AbstractThe addition of biochar to the forest floor should facilitate efficient carbon sequestration. However, little is known about how biochar addition effects litter decomposition, which is related to carbon and nutrient dynamics in forest ecosystems. This study evaluated the effect of biochar addition on leaf litter decomposition in a forest ecosystem. To examine whether leaf litter decomposition was stimulated above and below biochar, litterbag experiments were carried out for about 3 years in a field site where biochar was added at the rate of 0, 5 and 10 t ha−¹ (C0, C5 and C10 plots) to the forest floor in a temperate oak forest, Japan. Biochar addition at C10 significantly enhanced litter decomposition below biochar for 2 years after treatment and above biochar for 1 year after treatment. Litter water content in biochar plots tended to increase under dry conditions. Biochar addition enhanced litter decomposition because of increased microbial activity with increased moisture content and accelerated the decomposition progress rather than changing the decomposition pattern. However, the carbon emission through changing leaf litter decomposition was small when compared with the carbon addition by biochar, indicating that biochar could be an effective material for carbon sequestration in forest ecosystems.

scholarly journals Litter Production and Organic Compound Contents in the Sudano-guinea Savannahs of Ngaoundere, Adamawa, Cameroon

2020 ◽  
pp. 1-14
Author(s):  
Adamou Ibrahima ◽  
Paul Souhore ◽  
Ahmadou Babba
Keyword(s):  
Phenolic Compounds ◽  
Organic Compound ◽  
Nutrient Cycling ◽  
Organic Compounds ◽  
Leaf Litter ◽  
Plant Species ◽  
Plant Diversity ◽  
Forest Ecosystems ◽  
Litter Production ◽  
Cellulose Content

Litter production which is important for understanding nutrient cycling and assessing productivity in forest ecosystems is poorly studied in the African savannahs, particularly in the savannahs of Cameroon. Thus, litter production and organic compounds of the thirty-six (36) contrasting plant species were studied in the Sudano-guinea savannahs of Ngaoundere, Cameroon. Litter collected in framework of 50 cm x 50 cm under the three tree of each plant species in three sites of the savannahs of Ngaoundere during the period of their maximum fall that from November and January. After two years of collection, mean annual litter production varied from 0.36 in S. longipedunculata to 10.06 t.ha-1.year-1 in F. polita at Dang, from 0.14 in G. aqualla to 9.39 t.ha-1.year-1 in V. paradoxa at Biskewal, and from 0.35 in G. aqualla to 3.64 t.ha-1.year-1 in S. guineense var. macrocarpum at Wakwa. Contribution of leaf litter, fruits and wood were respectively more than 50%, 1.40% and 32% to the total litter. Litter production varied from 2.35 t.ha-1.year-1 at Wakwa to 2.91 t.ha-1.year-1 at Dang, but the sites did not differ significantly among them. Litter cellulose content varied from 4.11 in P. hookeri to 11.84% in V. doniana, that of lignin from 2.28 in V. paradoxa to 8.12% in V. doniana, that of NDF from 21.35 in S. guineense var. guineense to 75.73% in S. guineense var. macrocarpum, and that of phenolic compounds from 0.47 in V. doniana to 16.11% in C. molle. Litter production and organic compounds content were affected by plant diversity, but not by sites in the Sudano-guinea savannahs of Ngaoundere, Cameroon. These results would contribute to well select plant species for their domestication and to management of Adamawa savannahs of Cameroon.

scholarly journals Ground beetles (Coleoptera: Carabidae) diversity from pastures in Southern Bulgaria

2019 ◽  
Vol 2 ◽  
Author(s):  
Teodora Teofilova ◽  
Ivailo Todorov ◽  
Milka Elshishka ◽  
Vlada Peneva
Keyword(s):  
Species Composition ◽  
Life Form ◽  
Ground Beetle ◽  
Field Work ◽  
Life Forms ◽  
Ground Beetles ◽  
Pitfall Traps ◽  
Ecological Structure

This study aimed at clarifying the species composition and ecological structure of carabids, associated with active pastures. Field work was carried out in 2017 and 2018. Pitfall traps (5 in each site) were set in 10 sampling sites in Thracean Lowland and Sarnena Sredna Gora Mts. Captured beetles belonged to 90 species and 33 genera, representing 12% of the species and 26% of the ground beetle genera occurring in Bulgaria. The most diverse was genus Harpalus (22 species), followed by the genera Amara (7 species), Microlestes (6 species), Ophonus (6 species) and Parophonus (5 species). Twenty species were new for the region of the Thracean Lowland: Amara fulvipes (Audinet-Serville, 1821), Anisodactylus binotatus (Fabricius, 1787), A. intermedius Dejean, 1829, Apotomus clypeonitens Müller, 1943, Calathus cinctus Motschulsky, 1850, Carterus gilvipes (Piochard de la Brûlerie, 1873), Gynandromorphus etruscus (Quensel en Schönherr, 1806), Harpalus fuscicornis Ménétriés, 1832, H. subcylindricus Dejean, 1829, Microlestes apterus Holdhaus, 1904, M. corticalis (L. Dufour, 1820), M. fulvibasis (Reitter, 1901), M. maurus (Sturm, 1827), M. minutulus (Goeze, 1777), Notiophilus laticollis Chaudoir, 1850, Pangus scaritides (Sturm, 1818), Parophonus laeviceps (Ménétriés, 1832), P. planicollis (Dejean, 1829), Polystichus connexus (Geoffroy in Fourcroy, 1785) and Pterostichus strenuus (Panzer, 1796). Twenty species were new for the whole Sredna Gora Mts.: Acinopus picipes (Olivier, 1795), A. megacephalus (P. Rossi, 1794), Amara anthobia A. Villa et G. B. Villa, 1833, Ditomus calydonius (P. Rossi, 1790), Harpalus albanicus Reitter, 1900, H. angulatus Putzeys, 1878, H. attenuatus Stephens, 1828, H. dimidiatus (P. Rossi, 1790), H. flavicornis Dejean, 1829, H. pumilus Sturm, 1818, H. pygmaeus Dejean, 1829, H. subcylindricus Dejean, 1829, H. tardus (Panzer, 1796), H. signaticornis (Duftschmid, 1812), Lebia scapularis (Geoffroy, 1785), Microlestes fissuralis (Reitter, 1901), M. fulvibasis (Reitter, 1901), M. maurus (Sturm, 1827), M. minutulus (Goeze, 1777) and Ophonus sabulicola (Panzer, 1796). Fourty-one species were new for the region of the Sarnena Sredna Gora. Genus Apotomus, Gynandromorphus, Pangus and Polystichus were new geographic records for Thracean Lowland. Genera Acinopus and Ditomus were new for the Sredna Gora Mts. Fourteen life form categories were established (9 zoophagous and 5 mixophytophagous). The analysis of the life forms showed a slight predominance of the mixophytophages (53 species; 59%) over the zoophages (37 species; 41%). Microlestes minutulus was a constant species occurring in all sampling sites.

scholarly journals The Role of Quantitative Traits of Leaf Litter on Decomposition and Nutrient Cycling of the Forest Ecosystems

2013 ◽  
Vol 29 (1) ◽  
pp. 38-48 ◽  
Author(s):  
Mohammed Mahabubur Rahman ◽  
Jiro Tsukamoto ◽  
Yuji Tokumoto ◽  
Md. Ashikur Rahman Shuvo
Keyword(s):  
Nutrient Cycling ◽  
Leaf Litter ◽  
Quantitative Traits ◽  
Forest Ecosystems

scholarly journals Leaf litter decomposition rates increase with rising mean annual temperature in Hawaiian tropical montane wet forests

2014 ◽  
Author(s):  
Lori D Bothwell ◽  
Paul C Selmants ◽  
Christian P Giardina ◽  
Creighton M. Litton
Keyword(s):  
Leaf Litter ◽  
Litter Decomposition ◽  
Forest Ecosystems ◽  
Net Primary Productivity ◽  
Nutrient Release ◽  
Leaf Litter Decomposition ◽  
Mean Annual Temperature ◽  
Decomposition Rates ◽  
Litter Decay ◽  
Wet Forests

Decomposing litter in forest ecosystems supplies nutrients to plants, carbon to heterotrophic soil microorganisms and is a large source of CO2 to the atmosphere. Despite its essential role in carbon and nutrient cycling, the temperature sensitivity of leaf litter decay in tropical forest ecosystems remains poorly resolved, especially in tropical montane wet forests where the warming trend may be amplified compared to tropical wet forests at lower elevations. We quantified leaf litter decomposition rates along a highly constrained 5.2 °C mean annual temperature (MAT) gradient in tropical montane wet forests on the Island of Hawaii. Dominant vegetation, substrate type and age, soil moisture, and disturbance history are all nearly constant across this gradient, allowing us to isolate the effect of rising MAT on leaf litter decomposition and nutrient release. Leaf litter decomposition rates were a positive linear function of MAT, causing the residence time of leaf litter on the forest floor to decline by ~31 days for each 1 °C increase in MAT. Our estimate of the Q10 temperature coefficient for leaf litter decomposition was 2.17, within the commonly reported range for heterotrophic organic matter decomposition (1.5 – 2.5) across a broad range of ecosystems. The percentage of leaf litter nitrogen (N) remaining after six months declined linearly with increasing MAT from ~ 88% of initial N at the coolest site to ~74% at the warmest site. The lack of net N immobilization during all three litter collection periods at all MAT plots indicates that N was not limiting to leaf litter decomposition, regardless of temperature. These results suggest that leaf litter decay in tropical montane wet forests may be more sensitive to rising MAT than in tropical lowland wet forests, and that increased rates of N release from decomposing litter could delay or prevent progressive N limitation to net primary productivity with climate warming.

Concrete Frost along an Elevational Gradient in New Hampshire

1975 ◽  
Vol 5 (4) ◽  
pp. 700-705 ◽  
Author(s):  
Timothy J. Fahey ◽  
Gerald E. Lang
Keyword(s):  
Transition Zone ◽  
Leaf Litter ◽  
New Hampshire ◽  
Forest Ecosystems ◽  
Coniferous Forest ◽  
Weather Conditions ◽  
Elevational Gradient ◽  
Forest Types ◽  
Soil Frost ◽  
Sample Points

The occurrence and duration of concrete frost were observed at 28 forested sites along an elevational gradient on a New Hampshire mountain. The presence of concrete frost was determined with an aluminum probe on 17 dates between November 1973 and June 1974. Concrete frost was found at all sample points in soils of coniferous forest ecosystems above 950-m elevation from mid-November to mid-May; some concrete frost remained into early June. Concrete frost occurred at most sample points in soils of transition zone forests that were composed of mixed hardwoods and conifers for 4 months, in soils of northern hardwoods forests for 2 months, and in soils of successional fir stands at low elevations for 4 months. Winter weather conditions and differences in leaf litter insulation probably accounted for the variation of soil frost beneath these forest types.

scholarly journals CO2 enrichment and N addition increase nutrient loss from decomposing leaf litter in subtropical model forest ecosystems

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Juxiu Liu ◽  
Xiong Fang ◽  
Qi Deng ◽  
Tianfeng Han ◽  
Wenjuan Huang ◽  
...  
Keyword(s):  
Leaf Litter ◽  
Forest Ecosystems ◽  
Co2 Enrichment ◽  
Nutrient Loss ◽  
N Addition

Metadata provide insights on patterns of epiparasitism in mistletoes (Santalales), an overlooked topic in forest biology

Botany ◽  
2017 ◽  
Vol 95 (3) ◽  
pp. 259-269 ◽  
Author(s):  
Carol A. Wilson ◽  
Clyde L. Calvin
Keyword(s):  
Forest Ecosystems ◽  
Life Form ◽  
Species Abundance ◽  
Structural Diversity ◽  
Research Attention ◽  
The Tropics ◽  
Forest Biology

Mistletoes are aerial-branch parasites belonging to one of five families in the Santalales. Usually, mistletoe hosts are autotrophic, but if the hosts themselves are parasitic, the plant parasitizing the host is an epiparasite. Three categories of epiparasites are recognized, chance-, obligate-, and auto-epiparasites. Loranthaceae and Viscaceae comprise about 97% of mistletoe species and also the largest number of epiparasites. We report frequencies and biogeographical distributions of epiparasite – parasite host combinations for Loranthaceae and Viscaceae, and we summarize epiparasitism in other mistletoe families. Parasitic hosts are primarily recruited from Loranthaceae, whereas most epiparasites are members of Viscaceae. Twenty-seven species are considered likely to be obligate epiparasites. Data suggest species abundance influences whether mistletoes serve as host to other mistletoes. We found no reports of epiparasitism in Misodendraceae and only a few reports for Santalaceae, although Santalaceae are often root-parasitic hosts. In Phacellaria (Amphorogynaceae) all species are obligate epiparasites, mainly on Loranthaceae. Epiparasitism occurs worldwide and is most common in the tropics and subtropics. The greatest number of reports is from Oceania, the smallest from Africa. Epiparasitism in mistletoes has received little research attention, yet our research shows that this life form contributes to species and structural diversity in forest ecosystems across the globe.

scholarly journals Interaction of macroinvertebrates in leaf litter in forest ecosystems: a review

2021 ◽  
Vol 6 (2) ◽  
pp. 153-166
Author(s):  
Cinara Wanderléa Felix Bezerra ◽  
Luciana de Matos Andrade
Keyword(s):  
Leaf Litter ◽  
Arid Regions ◽  
Forest Ecosystems ◽  
Abiotic Factors ◽  
Climatic Conditions ◽  
Ecological Niches ◽  
Litter Production ◽  
Soil Fertilization ◽  
Leaf Litter Production ◽  
Semi Arid

The leaf litter consists of vegetable fragments/waste (e.g., leaves, fruits, twigs) and animals. Acting on soil fertilization through its decomposition and fragmentation by abiotic factors (for example, bacteria, fungi, invertebrates, and vertebrates), helping in the process of nutrient cycling, becoming an alternative in the recovery of degraded areas. Its production varies according to the climatic conditions of the region, being the observation as greater leaf litter production in tropical and subtropical areas, as well as the semi-arid regions, where the plants in greater depth lose their leaves allowing a higher deposition of the biomass in the soil. The leaf litter still acts, as it applies to a diversity of animals that they use as a means to develop. Among the most representative animals are the Annelida (Oligochaeta), Myriapoda (Chilopoda and Diplopoda), Hexapoda (Diptera, Hemiptera, Orthoptera, Coleoptera, Blattodea, Isoptera, Hymenoptera, Lepidoptera, Isopoda, Thysanura), Cheliceriformes Araneae, Scorpiones, Pseudoscorpiones and Opiliones), Mollusca (Gastropoda). All these factors make the leaf litter, a source of nutrients rich in organic compounds that help improve soil fertility and provides the animals that live in it a universe of ecological niches that suit the needs of each species.

Sign in / Sign up

Export Citation Format

Share Document