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40Ecosystem Transformation Трансформация экосистем
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Article
To the study of hemipteran assemblages (Insecta: Heteroptera) of aquatic and near-aquatic biotopes of the Meshchera National Park
Irina Yu. Lychkovskaya
Oka State Natural Biosphere Reserve, Brykin Bor 51, Spassky District, Ryazan Region, 391072 Russia heteroptera@yandex.ru
Received: 02.07.2020 Revised: 06.12.2020 Accepted: 06.12.2020 Published online: 19.01.2021
DOI: 10.23859/estr-200702 UDC 595.754 (470.314)
Translated by S.V. Nikolaeva
Abstract. This paper presents the results of a study of hemipteran assemblages in aquatic and semiaquatic biotopes ofthe Meshchera National Park. The insect fauna, which includes 80 species of 21 families, includes eurytopic species, polyphytophages, and broad oligophytophages, inhabiting biotopes with an herbaceous cover and a wide range of humidity. The fauna is mainly represented by Trans-Palearctic, Superatlantic and Holarctic species. The greatest faunistic similarity is characteristic of hemipteran associations of floodplain meadows with areas of sedge-forb shores (ICS = 29.1%) and sedge shores (ICS = 21.4%); in addition, the hemipteran assemblages of rivers and ditches are very similar (ICS = 14.8%).
Keywords: hemipteran associations, Vladimir region, specially protected natural areas, Pol River, Buzha River, Lake Svyatoe.
To cite this article. Lychkovskaya, I.Yu., 2021. To the study of hemipteran assemblages (Insecta: Heteroptera) of aquatic and near-aquatic biotopes of the Meshchera National Park. Ecosystem Transformation 4 (1), 53-60. https://doi.org/10.23859/estr-200702
Introduction
The territory of the Meshchera National Park, located in the basin of the Oka and Klyazma rivers, contains many bogs and marshy forest areas. The main rivers of the national park are the Buzha River and its left tributary, the Pol River. The rivers of Vladimir Meshchera flow out of large bogs, have low peat banks and a bottom lined with peat; the river valleys merge to a considerable extent with the surrounding swamps, the floodplains are also very swampy. These rivers are characterized by a slow flow and an unstable, often lost channel. In addition, the park contains a significant number of interconnected shallow lakes, most of which are glacial. In particular, these include Lake Svyatoe located in the extreme west of the park, the northernmost in the system of the Lakes Klepikovsky (Presnova and Naumova, 2012). The
abundance of water bodies of various origins on the territory of the "Meshchera Park" is of considerable interest from the point of view of the study of invertebrates directly related to the aquatic environment and semiaquatic biotopes.
Professional entomological studies of the hemipteran insects of the Meshchera National Park began only at the beginning of the 21st century. Two specialized papers were published on the hemipteran fauna of the Meshchera Lowland. Nikolaeva (2006) listed some species from this area, and Nikolaeva (2011) published the most complete to date preliminary list of the of terrestrial Hemiptera fauna of the national park (vicinity of Mezinovsky, Chernoe, Dmi-trovo) which included 126 species. The "Catalog of invertebrates (Invertebrata: Protozoa et Animalia) of the Vladimir region" (2003) listed 27 hemipteran spe-
cies, mainly common in Central Russia. Unfortunately, the latter work does not include precise collection localities for the invertebrates, so it is impossible to identify which species were found in the territory of the national park. In addition, two species and one supraspecific taxon of aquatic Hemiptera have been identified in the macrozoobenthos of the Meshchera National Park (Presnova and Naumova, 2012). In the above works, representatives of a number of families were not indicated for the national park: Corixidae, Notonectidae, Naucoridae, Mesoveliidae, Veliidae, Hebridae, Hydrometridae, and Gerridae. In the 2019 field season, the gap in the sampling of aquatic he-mipterans and water striders was filled (Lychkovskaya, 2020), with 21 species of Hemiptera, of which 12 were not previously recorded for the Vladimir region, were first identified for the water bodies of the Mesh-chera National Park. The purpose of this work is to continue the study of the fauna and ecology of he-mipterans in aquatic and semi-aquatic biotopes of the Meshchera National Park.
Materials and methods
The hemipterans were collected in 2019 at 10 sites in the Gus-Khrustalnyi District of the Vladimir Region, within the Meshchera National Park (Fig. 1). The study sites are described below.
1. Buzha River in the vicinity of the village of Urshelsky (Urshelsky district forestry, square no. 100), N 55°40.70' E 40°17.23'. The depth in the river medial zone is 0.3 m, in the river ripal zone it is 0.2 m. The bottom of the river section is covered by silt and plant remains. The river is heavily overgrown with macrophytes: rhizohydrophytes (pondweed Elo-dea canadensis, yellow water-lily) and hygrohelo-phytes (sedges, marsh cinquefoil). The riverbank is overgrown with forb-sedge with black alder, willow, and silver birch.
2. Buzha River, 500 m upstream of the intersection with the Urshelsky - Gus-Khrustalny highway, N 55°36.41' E 40°18.88'. Depth in the medial zone 0.5 m, in the ripal zone - 0.3 m. The substrate is muddy with plant remains. The riverbank is gentle, overgrown with hydrohelophytes and hygrohelo-phytes: sedges, fine-leaved water dropwort, common water-plantain. In the ripal zone, there are neisto-phytes (hornwort, frogbit), rhizohydrophytes (yellow water-lily, floating pondweed). Along the riverbank there is a floodplain forb meadow with sedges, marsh cinquefoil, loosestrife, and thickets of ash and willow.
3. Buzha River near the village of Yagodino. The following areas and biotopes were examined:
(a) Buzha River before the confluence with the Pol river, N 55°33.90' E 40°17.49'. The depth in the medial zone is 1.5-3.8 m, near the bank - 0.3-1.3 m. The substrate in the ripal and medial zones is sandy-clayey. Coastal vegetation is well developed and is
represented by sharp sedge, in some places by yellow water-lily. The bank is with a slope of 20-50°, overgrow by forbs, becomes a floodplain meadow with sedges, yarrow, sorrel, veronica, marsh gentian, loosestrife, etc. On the riverbank there are thickets of ash, willow, individual trees of Scots pine, and silver birch. The river is intensely used for recreational and tourist purposes.
(b) Buzha River after the confluence with the Pol River, N 55°33.79' E 40°17.65'. The depth at the bank is 0.2 m, in the medial zone, up to 0.5 m. The soil of the river is sandy-silty. The bank, with a slope of 10-30° passes from sedge thickets into a sedge-forb meadow; there are separate trees of pedunculate oak and Scots pine.
4. Buzha River in the vicinity of the village of Tyur-vishchi, N 55°25.00' E 40°12.19'. The depth in the medial zone is 0.3-0.7 m, in the ripal zone it is 0.3 m. The river bottom is silty, clayey-silty, sandy with silt. Near the riverbank, hydrohelophytes and hygrohelo-phytes grow: spike-rush, grass-rush, arrowhead, bur-reed, acute sedge. Of the rhizohydrophytes, a yellow water-lily was recorded. In 2019, the river became very shallow; on the floodplain meadow, there was common arrowhead, bur-reed, yellow water-lily, grass rush, frog-bit, sedges. Typical meadow plants include yellow loosestrife, purple loosestrife and cereal forbs.
5. Pol River near the village of Erleks, N 55°35.83' E 40°23.26'. Depth in the medial zone 0.5 m, in ripal zone - 0.2-0.5 m. The bottom is sandy-silty or silty with plant debris. In the ripal zone, thickets of spike-rush, frog-bit, yellow water-lily, common arrowhead, sedge were recorded. The riverbank is variable, gently sloping with willow thickets. The watercourse bank is equipped for recreational purposes and is intensely used for recreation.
6. Pol River near the village of Yagodino, N 55°33.88' E 40°17.63'. During the survey period, the river became shallow, the depth ranged from 0.2 to 1.2 m. The bottom is sandy-clayey, in places sandy with plant remains. The banks are overgrown with acute sedge. In the ripal zone, water-plantain and spike-rush were recorded.
7. Lake Svyatoe, N 55°22.34' E 40°12.38'. The substrate in the littoral is sandy with some silt, in the sublittoral, sapropel. The depth in the sublittoral zone is 1.5 m, in the littoral zone, up to 0.3 m. The following hydrophilic plants are recorded on the sandy bank: spike-rush, sedge, bur-reed, and common reed. The floodplain sedge-forb meadow with yellow loosestrife, purple loosestrife, in places with willows and silver birch.
8. Reclamation ditch in square no. 99 of Mez-inovsky Forestry, N 55°22.34' E 40°12.38'. Depth up to 0.7 m. The bottom is muddy with plant remains. Of the macrophytes, duckweed, floating fern, and frog-bit are well developed. The banks are overgrown with sedges.
Fig. 1. Scheme of collection points for material on the territory of the Meshchera National Park in 2019 (according to http://russia-karts. ru/karta-vladimirskaja-oblast-podrobnaja-s, modified). 1 - Buzha River, vicinity of the village of Urshelsky; 2 - Buzha River, 500 m above the intersection with the Urshelsky - Gus-Khrustalnyi highway; 3 - Buzha river near the village of Yagodino; 4 - Buzha River in the vicinity of the village of Tyurvishchi; 5 - Pol River near the village of Erleks; 6 - Pol River, near the village of Yagodino; 7 - Lake Svyatoe; 8 -reclamation ditch in square no. 99 of the Mezinovsky Forestry; 9 - drainage ditch of the railway embankment in the vicinity of Mezinovsky; 10 - swampy lowland near the village of Miltsevo.
9. Drainage ditch of the railway embankment in the vicinity of the village of Mezinovskiy, N 55°27.71' E 40°24.84'. Macrophytes include water knotweed, frog-bit, hornwort, and common reed along the bank.
10. Swampy lowland near the village of Miltsevo, N 55°30.13' E 40°26.73'. At the time of collecting the material, it was a dry area with sedges, bulrush, and willows.
According to the data for the city of Vladimir for the period from 2014 to 2019 (Weather..., 2019), in 2019 June was one of the warmest (+18.72° C) with average long-term indicators of +16.16° C, average air humidity in June this year was 60.4%. July and August during the study season turned out to be one of the coldest for the period 2014-2019, the average daily temperature was +15.38° C and +14.81° C, respectively. Average values of air humidity were 76.69% in July and 77.29% in August.
Insect were trapped from July to September 2019. In semiaquatic biotopes, methods of entomological sweeping of vegetation (hydrohelophytes and hygrohelophytes) and manual collection (from plants and soil) were used. Aquatic organisms were caught by sweeping with a water net in the ripal and littoral zones. Some material was obtained as part of of macrozoobenthos samples using an Ekman-Burge bottom grab with a capture area of 0.01 m2, and material was also collected using a fine-mesh drag. In addition, qualitative studies were carried out using a small water net.
The insects were identified using to the manuals "Keys to insects of the European part of the USSR" (Kerzhner and Yachevsky, 1964) and "Keys to freshwater invertebrates in Russia and adjacent territories" (Kanyukova, 1997); the nomenclature follows the "Catalogue of the Heteroptera the Palaearctic Region" (Aukema and Riger, 1995, 1996, 1999, 2001, 2006).
When assessing the degree of similarity of the faunas of different biotopes, the Czekanowski-S0rensen index was used for quantitative data (ICS, %). The calculation of the number of insects per unit area during sweeping was carried out according to the formula of M.S. Gilyarov and T.S. Perel (1966). The frequency of occurrence of animal species per total number of samples was calculated according to Kamenev (2002). During quantitative counts in additional samples, there were 4 lifts per 1 combined sample (total - 29 combined samples), when sweeping with a hydrological net for 1 sample - 10 strokes (total - 24 samples), when sweeping on ground vegetation per sample - 50 strokes (total - 50 samples). To analyze the dominant structure of the fauna of he-mipterans, Renkonen's abundance scale was used (Renkonen, 1938).
Results
In 2019, 80 species of Hemiptera were recorded in the fauna of the Meshchera National Park. The following families are represented: Nepidae (2 species), Corixidae (5), Naucoridae (1), Notonectidae (2), Pleidae (1), Mesoveliidae
(1), Hebridae (1), Hydrometridae (1), Veliidae (2), Gerridae (5), Saldidae (3), Nabidae (4), Anthocoridae
(2), Miridae (20), Lygaeidae (9), Rhopalidae (3), Coreidae (1), Plataspidae (1), Acanthosomatidae (1), Scutelleridae (2), and Pentatomidae (13).
Below is a taxonomic list of the hemipterans of the Meshchera National Park; asterisks mark the species recorded for the first time for the Vladimir region. The numbers indicate the collection point (see Fig. 1), the collection methods are indicated in parentheses: entomological sweeping (e), water net sweeping (w), bottom grab samples (b), fine-mesh drag (fd), manual collection (m). Representatives of the families Nabidae, Anthocoridae, Miridae, Lygaeidae, Rhopalidae, Coreidae, Plataspidae, Acanthosomatidae, Scutelle-ridae, and Pentatomidae were almost all collected by entomological sweeping and were only occasionally collected by hand from plants and soil. It should be noted that occurrences of representatives of Corixidae, Hydrometridae and Gerridae in bottom grab samples are accidental.
List of Heteroptera of the Meshchera National Park
Family Nepidae Latreille, 1802
Nepa cinerea Linnaeus, 1758 - 1 (w, b), 5 (w, b). Ranatra linearis (Linnaeus, 1758) - 4 (w), 7 (fd).
Family Corixidae Leach, 1815
Micronecta pusilla (Horvath, 1895) - 2 (w). Cymatia coleoptrata (Fabricius, 1777) - 1 (w, b), 2 (w, b), 4 (w, b).
Hesperocorixa linnaei (Fieber, 1848) - 1 (w), 2 (b),
4 (b).
H. sahlbergi (Fieber, 1848) - 1 (w), 4 (b), 8 (w), 9 (w). Paracorixa concinna concinna (Fieber, 1848) - 2 (w).
Family Naucoridae Leach, 1815
Ilyocoris cimicoides cimicoides (Linnaeus, 1758) - 4 (w), 5 (w).
Family Notonectidae Latreille, 1802
Notonecta glauca glauca Linnaeus, 1758 - 9 (w). N. lutea Müller, 1776 - 3 (w).
Family Pleidae Fieber, 1851
Plea minutissima minutissima Leach, 1817 - 4 (w),
5 (w).
Family Mesoveliidae Douglas & Scott 1867
Mesovelia furcata Mulsant & Rey, 1852 - 4 (w), 5 (w).
Family Hebridae Amyot & Serville, 1843
Hebrus pusillus pusillus (Fallen, 1807) - 4 (w).
Family Hydrometridae Billberg, 1820
Hydrometra gracilenta Horvath, 1899 - 1 (w), 5 (b).
Family Veliidae Brulle, 1836
Microvelia reticulata (Burmeister, 1835) - 4 (w). Velia sauliiTamanini, 1947 - 4 (w).
Family Gerridae Leach, 1815
Aquarius paludum paludum (Fabricius, 1794) - 1 (b). Gerris lacustris (Linnaeus, 1758) - 1 (w), 3 (w), 5 (w), 9 (w).
G. thoracicus Schummel, 1832 - 1 (b). G. odontogaster (Zetterstedt, 1828) - 1 (w), 3 (w), 5 (w).
G. lateralis Schummel, 1832 - 1 (w), 5 (w).
Family Saldidae Amyot & Serville, 1843
*Saldula arenicola (Scholtz, 1847) - 7 (e). *S. pallipes (Fabricius, 1794) - 7 (e). S. opacula (Zetterstedt, 1838) - 7 (e).
Family Nabidae A. Costa, 1853
Himacerus apterus (Fabricius, 1798) - 2.
Nabis brevis brevis Scholtz, 1847 - 1.
N. ferus (Linnaeus, 1758) - 9.
N. pseudoferus pseudoferus Remane, 1949 - 1, 10.
Family Anthocoridae Fieber, 1836
*Anthocoris nemoralis (Fabricius, 1794) - 4. *Orius minutus (Linnaeus, 1758) - 7.
Family Miridae Hahn, 1833
Deraeocoris ruber (Linnaeus, 1758) - 4. Adelphocoris lineolatus (Goeze, 1778) - 7. A. ticinensis (Meyer-Dür, 1843) - 2, 4, 7. Apolygus limbatus (Fallen, 1807) - 3. A. lucorum (Meyer-Dür, 1843) - 6. Lygocoris pabulinus (Linnaeus, 1761) - 1, 3, 5. L. contaminatus (Fallen, 1807) - 3. Lygus gemellatus gemellatus (Herrich-Schaeffer, 1835) - 2, 3, 5.
L. pratensis (Linnaeus, 1758) - 3. L. punctatus Zetterstedt, 1838 - 1. L. rugulipennis Poppius, 1911 - 1, 3. L. wagneri Remane, 1955 - 3, 7. *Polymerus vulneratus (Panzer, 1806) - 3. *Notostira erratica (Linnaeus, 1758) - 3. Stenodema calcarata (Fallen, 1807) - 3.
Trigonotylus ruficornis (Geoffroy, 1785) - 3. Orthocephalus brevis (Panzer, 1798) - 1. *Monosynamma bohemanni (Fallén, 1829) - 3. Oncolytus punctipes Reuter, 1875 - 1. Plagiognathus chrysanthemi (Wolff, 1804) - 3.
Family Lygaeidae Schilling, 1829
Nithecus jacobaeae (Schilling, 1829) - 1, 3. Nysius ericae ericae (Schilling, 1829) - 3. N. helveticus (Herrich-Schaeffer, 1850) - 3. *Ortholomus punctipennis (Herrich-Schaeffer, 1838) - 4.
Kleidocerys resedae resedae (Panzer, 1797) - 3. *Cymus aurescens Distant, 1883 - 1. C. claviculus (Fallén, 1807) - 1. C. glandicolor Hahn, 1832 - 1. Geocoris dispar (Waga, 1839) - 7.
Family Rhopalidae Amyot & Serville, 1843
*Brachycarenus tigrinus (Schilling, 1829) - 9. Rhopalus parumpunctatus Schilling, 1829 - 4. Myrmus miriformis miriformis (Fallén, 1807) - 1, 2, 3, 5.
Family Coreidae Leach, 1815
Coreus marginatus marginatus (Linnaeus, 1758) - 3 (e, m).
Family Plataspidae Dallas, 1851
Coptosoma scutellatum (Geoffroy, 1785) - 1.
Family Acanthosomatidae Signoret, 1864
Acanthosoma haemorrhoidale haemorrhoidale (Linnaeus, 1758) - 4, 7 (m).
Family Scurelleridae Leach, 1815
Eurygaster maura (Linnaeus, 1758) - 1, 4, 7. Eu. testudinaria testudinaria (Geoffroy, 1785) - 3, 4, 6, 7 (e, m).
Family Pentatomidae Leach, 1815
Sciocoris cursitans cursitans (Fabricius, 1794) - 3. S. umbrinus (Wolff, 1804) - 1, 3. Eurydema oleracea (Linnaeus, 1758) - 4. *Eysarcoris aeneus (Scopoli, 1763) - 7. Dolycoris baccarum (Linnaeus, 1758) - 3. Carpocoris purpureipennis (De Geer, 1773) - 3. Holcostethus strictus vernalis (Wolff, 1804) - 3. Palomena prasina (Linnaeus, 1761) - 1, 2, 3. *Rubiconia intermedia (Wolff, 1811) - 3. Picromerus bidens (Linnaeus, 1758) - 1. Piezodorus lituratus (Fabricius, 1794) - 3. Pentatoma rufipes (Linnaeus, 1758) - 3. Aelia acuminata (Linnaeus, 1758) - 3.
In the structure of hemipteran assemblages, no families were identified that predominate in species diversity and density in all areas of the Meshchera National Park surveyed in 2019. It should be noted that due to unfavorable weather conditions accompanying the fieldwork, the hemipteran assemblages of meadow biocenoses in most of the study sites (1, 2, 4, 5, 7) were minimally represented.
According to the results of collections in 2019, the abundance and occurrence of Hemiptera were low, most terrestrial species were recorded in only 2.0% of the samples. The small number of chorto-bionts (average density was 0.8 ind./m2, maximum 3.5 ind./m2), which are usually the largest group, indicates unfavorable weather conditions for all ecological groups of hemipterans in July and August 2019. On sedge-overgrown riverbank slopes, near the water's edge and on floodplain meadows, N. jacobaeae (12.0% of samples), a mesophilic polyphytophage (on Brassicaceae, Asteraceae, Fabaceae, etc.), A. ticinensis (12.0% of samples) - hygro-mesophi-lic polyphytophage (legumes and other herbaceous plants), M. miriformis (16.0% of samples) is a meso-philic oligophytophage (on cereals), as well as broad oligophytophages (on grasses, sedges): mesophilic Eu. maura (12.0% of samples) and hygro-mesophilic Eu. testudinaria (10.0% of samples) were the most common. Of the aquatic hemipterans, C. coleoptrata (20.7% of samples) and I. cimicoides (15.1% of samples) were most often found in samples. Among water striders, the highest occurrence was observed in G. odontogaster (7.6% of samples) and G. lacustris (5.7% of samples).
According to the Renkonen abundance scale, the dominant species in the surveyed biotopes are the usual representatives of stagnant and slowly flowing water bodies G. lacustris (9.2% of the total number of collected hemiptera), C. coleoptrata (8.9%), and I. cimicoides (5.9%). Representatives of nekton and epineuston H. sahlbergi (4.7%), G. odontogaster (4.5%), as well as M. furcata (epineuston) and epi-geobiont H. pusillus (3.1% each) have subdominant status. In addition, chortobionts, mainly broad oligophytophages: A. ticinensis (4.7%), Eu. testudinaria (3.9%), Eu. maura (3.6%), M. miriformis (2.8%), L. pabulinus, O. punctipes, N. ericae, C. marginatus, P. prasina (2.0% each). The proportion of other species does not exceed 1.9%.
In coastal biotopes, among the dominates and subdominants, the main nucleus is mesophilic species (70%); meso-hygrophilous (20%) and meso-xe-rophiles (10%) are represented to a lesser extent. The predominance of mesophilic species over hygrophilic species in coastal ecotonic bitotopes was previously indicated by A.M. Kondratyeva and V.B. Golub. They explain this pattern by the fact that ecotonic ecosys-
tems, taking into account the high number of species inhabiting them with a wide ecological plasticity, act as reserves that enrich and stabilize adjacent open ecosystems (Kondratyeva and Golub, 2011; Kondratyeva, 2014).
The main life form represented in the studied biotopes are chortobionts (53.8%), mainly polyphy-tophages and broad oligophytophages. The next group in terms of the number of species was nekton organisms, accounting for 16.3% of the number of species. Other life forms accounted for 29.9%.
The fauna of bugs in coastal water biotopes of the Meshchera National Park is represented mainly by Trans-Palaearctic (45.0%), Superatlantic (23.8%) and Holarctic species (15.0%). Species with the Panatlantic type of distribution account for 8.8%, and that for the Western ones - 3.8%. Fewer species were recorded with Western-Pan-Continental, Trans-Eurasian, and Western-Palearctic ranges - 1.3% each. In the longitudinal direction, boreal-subtropical species prevail (73.8%).
When analyzing the faunistic similarity of the hemipteran assemblages of different biotopes, two groups were distinguished: aquatic ecosystems and semi-aquatic biotopes. Among aquatic biotopes, the complexes of rivers with ditches (14.8%) were distinguished by the greatest faunistic similarity due to representatives of the families Corixidae and Gerridae. For the river and lake complexes, the Czekanowski-S0rensen index was 8.7%. In semi-aquatic biotopes, the maximum faunistic similarity was noted in the hemipteran associations of floodplain meadows with areas of sedge-forb banks (29.1%) (Table 1). Sedge shores with floodplain meadows are slightly less similar (21.4%). The rather high level of similarity of the faunas of sedge banks with deciduous trees (18.2%) is most likely associated with the ecotonic effect: the location of plantings or single deciduous trees close to the water's edge, and, accordingly, next to sedge thickets, makes it possible to collect not only dendro-bionts (A. haemorrhoidale, P. rufipes, etc.), but also species of the herbaceous tier (representatives of the families Miridae, Lygaeidae, Pentatomidae).
Conclusions
In 2019, 80 hemipteran species from 21 families, including 12 species reported for the first time in the Vladimir region, were recorded in the fauna of the Meshchera National Park. In the structure of the hemipteran assemblages in the Meshchera National Park, no families were identified that predominate in species diversity and density in all surveyed sites. The fauna of hemipterans in semiaquatic biotopes is represented mainly by eurytopic species with wide trophic connections, inhabiting biotopes with an herbaceous cover and a wide range of humidity. The
Table. 1. Degree of faunistic similarity of hemipteran associations in semiaquatic biotopes of the Meshchera National Park (ICS,%). The number of species is given along the central diagonal.
Biotope
Sedge Sedge-forb Sandy Flood Shrubs Deciduous bank bank bank meadow trees
Sedge bank 8
Sedge-forb 16 3
bank 163
33
Sandy bank 0
Flood meadow 21.4
29.1
16
Shrubs
11.8
13.0
8.0
Deciduous trees
18.2
4.4
7.1
10
0
1
0
0
7
0
0
hemipteran associations of aquatic and semiaquatic biotopes of the Meshchera National Park are mainly represented by Trans-Palearctic (45.0%), Super-atlantic (23.8%) and Holarctic (15.0%) species with addition of European fauna species. The hemipteran associations of floodplain meadows with sedge-forb shores (ICS = 29.1%) and sedge shores (ICS = 21.4%) are characterized by the maximum faunistic similarity. Among the water bodies, the greatest similarity was recorded for the hemipteran assemblages of rivers and ditches (ICS = 14.8%).
Acknowledgments
The author expresses his gratitude to the Deputy Director of the Federal State Budgetary Institution "Oksky Zapovednik" V.P. Ivanchev for organizing field research and providing material collected with a fine-mesh drag.
ORCID
IrinaYu. Lychkovskaya 0000-0003-0090-0036 References
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