Swamp Ecosystem Research Articles

Determination of geochemical stability of swamp ecosystems of the taiga zone of Western Siberia to anthropogenic impact

Relevance. The need for scientifically based regulation of impacts on wetland ecosystems taking into account their specificity and geochemical stability. Aim. To determine the geochemical stability of wetlands in the taiga zone of Western Siberia to pollutants for two typical cases associated with: 1) operation of sludge pits; 2) discharge of domestic and industrial wastewater. Methods. Mathematical modeling, statistical methods. Results and conclusions. The authors have carried out the analysis of the results of studies of the chemical composition of wetland waters and extracts from peat and mineral soils of wetlands in the taiga zone of Western Siberia (mainly in the Tomsk region, as well as in the adjacent territories of the Khanty-Mansiysk Autonomous Okrug, Novosibirsk and Omsk regions). They obtained the estimates of the average values of geochemical indicators of wetland waters and peat by the depth of the peat deposit in peat bogs with varying degrees of anthropogenic impact. The paper introduces the method for assessing the anthropogenic impact of wastewater discharge and geomigration on swamps in areas where oil and gas facilities are located (permissible concentrations in wastewater entering swamp ecosystems), taking into account the «geochemical background» and sorption capacity of peat. In particular, the authors substantiated and tested the method for assessing the values of permissible concentrations, which should be considered as a «relatively safe» level of impact on swamp ecosystems, at which secondary pollution of swamp waters is not expected. It is shown that anthropogenic changes are mainly limited vertically by the upper layer of the peat deposit up to 1–2 m, and horizontally (within the active horizon of the peat deposit) – by areas up to 100–200 m.

New Jurassic notocupedins (Coleoptera: Archostemata: Ommatidae) from the Qinghai-Xizang (Tibetan) Plateau

Beetles belonging to the extinct tribe Notocupedini (Archostemata: Ommatidae) are widespread in Mesozoic deposits. Two new Early Jurassic species in the first reported Mesozoic insect assemblage from the Qinghai-Xizang (Tibetan) Plateau are proposed in the genus/collective group Zygadenia. Zygadenia dachaidanensis n. sp. can be distinguished from other congeners based on a combination of small size, oval head, large eyes, absence of longitudinal suture on metasternum, slightly narrowed elytron below humerus, maculated round window cells, and sub-rectangular scutellum; Zygadenia haixiensis n. sp. can be distinguished from other congeners based on a combination of elongated head, uniquely contracted ventrite 5, metasternum with longitudinal suture and elytron without prominent longitudinal veins. The two species represent the first record of Archostemata from the Qinghai-Xizang Plateau, extending the palaeogeographical distribution of Archostemata, and are important an aid to the reconstruction of the Early Jurassic swamp ecosystem in the Qinghai-Xizang Plateau.

Population structure and exploitation rate of striped snakehead (Channa striata) in Kawunganten Swamp, Cilacap, Indonesia: Important for fisheries management

Abstract. Setyaningrum N, Sugiharto, Susatyo P. 2024. Population structure and exploitation rate of striped snakehead (Channa striata) in Kawunganten Swamp, Cilacap, Indonesia: Important for fisheries management. Biodiversitas 25: 3255-3263. Snakehead (Channa striata) is a swamp fish spread in almost all Indonesian waters and has a high economic value. In addition, Bringkeng, Grugu, and Babakan Villages are included in Kawunganten Swamp areas with good fishing potential. Therefore, this study aimed to determine the population structure and the exploitation rate of Channa striata in Kawunganten Swamp Cilacap, Indonesia. The survey method with purposive random sampling was used and this study was conducted from April to July 2020. The fish samples were collected from three Bringkeng, Grugu, and Babakan Swamp stations, while the variables examined were abundance and rate of exploitation. The parameters measured included the length of Channa striata as well as the growth and mortality rate in each swamp. Abundance was analyzed using the Kruskal-Wallis test, and exploitation rate was assessed with Pauly's model using FAO-ICLARM Stock Assessment Tools II (FISAT II). The results showed that the highest abundance of Channa striata was in Bringkeng station, three times higher than in Babakan station. Bringkeng and Babakan stations were considered a fish-rearing swamp due to the dominance of adolescence-sized samples. Grugu was identified as the breeding area because many of the fish present were in the reproductive phase. Estimated growth parameters showed a maximum length (L?) of 35.18 cm, while exploitation rate of 0.28 was not considered excessive capture. Efforts to manage Channa striata were important to preserving biodiversity and ensuring the sustainability of Kawunganten Swamp ecosystem for future generations.

Remote Sensing for Restoration Change Monitoring in Tropical Peat Swamp Forests in Malaysia

Effective planning and management strategies for restoring and conserving tropical peat swamp ecosystems require accurate and timely estimates of aboveground biomass (AGB), especially when monitoring the impacts of restoration interventions. The aim of this research is to assess changes in AGB and evaluate the effectiveness of restoration efforts in the North Selangor Peat Swamp Forest (NSPSF), one of the largest remaining peat swamp forests in Peninsular Malaysia, using advanced remote sensing techniques. A Random Forest machine learning method was employed to upscale AGB estimates, derived from a ‘LiDAR AGB model’, to larger landscape-scale areas with Sentinel-2 spectral and textural variables. The time period under investigation (2015–2018) marked a concentrated phase of restoration and regeneration efforts in NSPSF. The results demonstrate an overall increase in tropical peat swamp AGB during these years, where the total amount of estimated AGB stored in NSPSF increased from 19.3 Tg in 2015 to an estimated 19.8 Tg in 2018. The research found that a tailored variable selection approach improved predictions of AGB, with optimised input variables (n = 62) and parameter adjustments producing a good plausible result (R2 = 0.80; RMSE = 55.2 Mg/ha). This paper concludes by emphasizing the importance of long-term studies (>5 years) for analyzing the success of tropical peat swamp restoration methods, with a potential for integrating remote sensing technology.

Mosquito Vector Ecology in Swamp Ecosystems

This study investigates the ecological dynamics of mosquito vectors in the swamp ecosystems of Desa Kebun Raya, Kecamatan Kintap, Kabupaten Tanah Laut, Kalimantan Selatan. An entomological survey was conducted to assess species composition, abundance, and larval indices in relation to the unique swamp habitat. Four mosquito species were identified: Culex quinquefasciatus, Culex tritaeniorhynchus, Aedes aegypti, and Aedes albopictus. The dominance of Culex species, particularly C. quinquefasciatus, suggests a strong adaptation to the swamp environment. Larval indices indicated a high risk of vector-borne disease transmission, with a House Index (HI) of 35%, Container Index (CI) of 0.14%, and Breteau Index (BI) of 64%. The study highlights the complex interactions between swamp ecology, mosquito population dynamics, and potential disease transmission risks in this understudied region of Indonesia.

Assessing the Health of South Kalimantan Coastal Swamp Wetlands using Measurements of Heavy Metals in Commercial Fish Species

Heavy metals pollution damages coastal swamp ecosystems. This study’s primary purpose was to determine the amounts of heavy metals in coastal swamp waters and the tissues of three fish species (Mugil cephalus, Arius sagor and Plotosus lineatus). This study determined that the water in the coastal swamps of South Kalimantan was contaminated with heavy metals in the following order: Fe > Cu > Zn > Cr > Pb > Cd > Hg. The heavy metal concentrations found in the three commercial fish species are as follows: Fe > Zn > Cu > Cr > Pb > Cd > Hg. The bioaccumulation of heavy metals was highest in Mugil cephalus, followed by Arius sagor and Plotosus lineatus. The Fe, Cu and Cr concentrations in Mugil cephalus, Arius sagor and Plotosus lineatus exceeded the international and national MPLs. The liver tissue has the highest capacity to bioaccumulate heavy metals. Regular monitoring of these metals in fish and water sources is recommended to ensure the safety and conservation of coastal swamp wetlands.

A rich coprolite assemblage from Angeac-Charente (France): A glimpse into trophic interactions within an Early Cretaceous freshwater swamp

Coprolites (fossil droppings) are common in the Mesozoic fossil record. However, coprolite assemblages from continental settings have more rarely been quantitatively analysed than the marine ones. The excavation of the Berriasian continental Lagerstätte of Angeac-Charente (France) during the last decade has resulted in unearthing a vast number of fossils, including ca. 6000 coprolite specimens. This large collection, accompanied by spatially landmarked depositional data, offers a unique opportunity to assess the organism interactions in an Early Cretaceous freshwater swamp ecosystem. We assign the coprolites to nine morphotypes based on their morphology and contents (using tomography and thin-sections), and to four taphonomic categories. We compare the specimens to other fossil and recent droppings, including newly imaged crocodilian faeces. While the Angeac-Charente biota comprised animals of a range of different ecologies, including waters primary inhabitants (chelonians, crocodylomorphs, actinopterygians) and a variety of dinosaurs, the coprolites, together with other ichnological evidence, such as bite marks, seem to largely illustrate the activity of the crocodylomorphs in this ancient swamp. The assemblage is compared to previously analysed continental Cretaceous copro-assemblages from Europe and North Africa.

Effect of Silica Fume Addition on Mechanical Properties of Concrete in Peat Swamp Water Environment

Hydraulic Portland cement, water, fine and coarse aggregate, and additional ingredients can be added or left out to create concrete. Making and maintaining concrete requires water as a reagent in the cement mixture so that a chemical reaction occurs when it undergoes the hydration process, which is the process where the cement begins to bind the ingredients that make up the concrete and then hardens and forms a solid mass. The need for water in concrete care is to soak it during the hardening process, however, not all types of water can be used. Peat swamp water is water that collects or flows within the peat swamp ecosystem. Peat swamps are a type of swamp formed from organic material accumulated over thousands of years. Silica fume is a material that contains SiO2 greater than 85% and is a very smooth, round material with a diameter of 1/100 the diameter of cement. The swamp water used in this research was taken from Jl. Rappokalling, Tallo District, Makassar City, South Sulawesi. Mix Design uses the Indonesian National Standard (SNI) 03-2834-2000 method with a planned concrete quality (f'c) of 25 MPa. Compressive strength tests were performed on concrete that was 7 and 28 days old for split tensile strength, and on the 28-day old concrete for modulus of elasticity. The concrete's compressive strength ratings after 28 days in variations of immersion in normal water and peat swamp water are 25,842 MPa and 20,749 MPa. From the test results, it was found that the average split tensile strength value of concrete for variations in normal water immersion and peat swamp water was 2.545 MPa and 1.886 MPa. From the results of the modulus of elasticity test, it was found that the average concrete in normal water immersion and peat swamp water variations was 19893.961 MPa, and 17109.75 MPa.

Biodiversity in Swamp Ecosystem in Sukamaju Village, Malind District, Merauke Regency, South Papua Province, Indonesia

Background: The level of diversity has a crucial role in the stability of the ecosystem. The higher the variety, the more stable an ecosystem, including agricultural land cultivated by farmers. Increasing of population affected the higher demanding of community towards their consumption activities. Especially, the natural resources that comes from local area such as Sukamaju District. Biodiversity of resources urgently needed to preserve the ecosystems meanwhile being the potential source to fulfilled nourishment of the people. This study aims to determine the diversity of peatland ecosystems by using a purposive sampling method in every selection of subject groups based on the characteristics or characteristics of a specific population. Methods: Field and Laboratory activities are needed in this research. Sample collection using several methods according to the targeted sample. Most of the sample using purposive sampling but also line intercept transect method. Fish sampling used a fishing gear called a gill net with a mesh size of 2-7 inches. The fish caught is placed in a labeled coolbox. Insect collection was running in the morning at 07.00-11.00 and in the afternoon at 3-5 pm (UTC+09:00). Sampling is held once a month for three months at predetermined coordinate points. Diversity was analyzed using Shannon-Wienner diversity, evenness index, dominance index and intensity on peatlands. Result: The results found seven orders and 30 families, with a total population of 1,231 individuals. The most dominant types of insects are the orders Coleoptera, Hemiptera and Lepidoptera. High diversity index (H'=3.021), high evenness index (E= 0.86243) and low dominance index (D=0.3101). Fish community structure obtained diversity index (H¢) included in the medium category, for uniformity values in the high class and dominance index values in the low sort. The dominant fish species found were Channa striata, Anabas testudineus, Lates calcalifer, Mugil cephalus, Plotosus papuensis and Toxotes chataerus, while Oreochromis niloticus, Oreochromis mossambicus, Hexanematichthys sagor and Megalops cyprinoides. While the types of molluscs found to have the highest abundance were Pila ampullacea, Pomacea canaliculata and Pilsbryoconcha exilis.

Report of new myristica swamp ecosystems from the Western Ghats at Pathanapuram, Kerala, India

We present a new distributional report of myristica swamp ecosystems in the Western Ghats at Pathanapuram, Kerala, India based on several distinct field surveys from April 2022 to June 2022. From Kerala, myristica swamp has previously been reported mainly from Shendurney Wildlife Sanctuary, Kulathupuzha Reserve Forests, and adjoining regions of the Anchal forest ranges in southern Western Ghats. The present study described and illustrated the occurrence of myristica swamp from the Pathanapuram forest range in Kerala for the first time. The observed myristica swamps from the Pathanapuram forest range are seen inside the Ambanar model forest station and Punnala forest station limits. A total of 18 myristica swamp patches from Ambanar and seven myristica swamps from Punnala were reported and captured. A pilot survey from these sites suggests they are abundant with various faunal and floral wealth. Therefore, recognition and conservation of these ecosystems are essential and vital and suggest further surveys and conservation efforts.

Insights into the behavior and kinetics of purun tikus degradation during slow pyrolysis

Purun tikus (Elocharis dulcis), a type of wetland biomass feedstock, is a challenge to the swamp ecosystem as it contributes to pollution in the area. Hence, integrating the use of purun tikus as a source of bioenergy, particularly in the form of bio-oil, is of the highest priority. Nevertheless, there is a lack of research on the degradation rate of purun tikus conversion to bio-oil through pyrolysis. Thus, this study aims to evaluate the rate of destruction of purun tikus in the process of conversion into bio-oil via pyrolysis. In the experiment, a batch reaction vessel was used to carry out slow pyrolysis at temperatures ranging from 300 to 500 °C, and the reaction times ranged from 60 to 120 min. By assuming a first-order process and using the Arrhenius equation, it was possible to figure out the activation energy and the preexponential factort. To determine whether purun tikus destroyed during pyrolysis, an activation energy of 43.317 kJ mol-1 and a pre-exponential factor of 0.351 s-1 were identified.

Effect of experimental warming on dissolved organic matter and bacterial diversity in a forest swamp soil

Forest swamp ecosystems play an important role in the global carbon cycle, yet they are often overlooked. With global climate warming, it is inevitable that it will impact the relationship between soil microorganisms and organic matter. Dissolved organic matter (DOM) in the soil environment is extremely sensitive to environmental changes. Understanding the effects of climate change on DOM and microorganisms is crucial for assessing the stability of carbon (C) in forest swamp soils. Therefore, we conducted a 142-day laboratory warming incubation experiment (control: 10 °C, and warming: 20 °C) to investigate the response of forest swamp soil microbial and DOM properties to warming. Excitation-emission matrix (EEM) fluorescence spectroscopy was used to explore the changes in different material compositions of DOM over time at different incubation temperatures, and high-throughput sequencing was used to investigate the changes in soil bacteria. The DOM content (dissolved organic C, DOC) and the degree of humification index (HIX) increased with an increase in incubation time under warming conditions (p < 0.05). In contrast, microbial humic substances (C3) decreased with increasing time. Long-term warming has separated bacterial communities and gradually tightened the degree of connectivity between bacterial networks. The degree of soil humification (Mantel test r = 0.58, p < 0.01) and DOC (r = 0.21, p < 0.05) were the most critical indicators that changed the diversity of the bacterial community. Our findings suggest a degree of interaction between changes in forest swamp soil microbial communities and DOM under warming conditions. The results of this study contribute to our understanding of changes in DOM fluorescence indices in forest swamp soils under the influence of climate change and their associated microbial mechanisms.

ЭЛЕМЕНТНЫЙ СОСТАВ МИНЕРАЛЬНЫХ ФАЗ В ТОРФЯНЫХ ОТЛОЖЕНИЯХ БОЛОТА ДУЛИХА (ПРИБАЙКАЛЬЕ) ПО ДАННЫМ МЕТОДОВ РЕНТГЕНОСПЕКТРАЛЬНОГО АНАЛИЗА

The paper deals with a detailed study of the Holocene core of drilling peat deposits of the upland (oligotrophic) Dulikha bog. Based on the results of non-destructive X-ray fluorescence analysis, SiO2, Al2O3 and Fe2O3 oxides predominate in the peat deposit chemical composition along the section depth. The main minerals of the peat ash part are mica, quartz, plagioclase, bassanite, potassium feldspar; secondary one is chlorite, accessory ones are amphibole, illite. The study results of peat substance by energy-dispersive X-ray microanalysis showed that peat deposits are represented by a mixture of particles and conglomerates of various shapes and sizes. The elemental composition of the main matrix of samples is presented by an organic component with a high content of C and O and silicate mineral component with a content of Na, Mg, Al, Si, P, S, Cl, K, Ca, Ti, Cr, Mn, Fe. Single small bright particles of facetted and semi-facetted shape with a high content of Fe, Ti, Ca, Ba and W occur in almost all studied peat samples. The mineral component of these particles may be represented by magnetites, titanites, single metal granules. The upper interval of the peat bog section (0-20 cm) is characterized by increased concentrations of Cu and Zn, that may be due to both anthropogenic stress on swamp ecosystems and high biophillyng, i.e. the ability to accumulate living matter.

Sustainability Indicators of Kalang Buffalo Production Systems in Swamp Ecosystems in South Kalimantan

This study aims to identify problems, identify and analyze stakeholders and determine indicators (qualitative and quantitative) for the sustainability of kalang buffalo production systems in swamp ecosystems in South Kalimantan. The kalang buffalo is a type of mud buffalo that is reared using the kalang system. In the local language, kalang is an enclosure built in the middle of swamp waters. This study is expected to be a source of information for academics, farmers, communities and policymakers in South Kalimantan Province regarding the strategic function of Kalang buffalo for the people of South Kalimantan. Data collection was done by describing the problem and determining relevant stakeholders. The literature study was conducted with expert discussion. FGDs were also conducted to explore important issues, followed by SWOT (Strengths, Weaknesses, Opportunities, and Threats) analysis and to determine relevant issues. Situation analysis and secondary data showed that the Kalang buffalo population is declining. Stakeholder identification identified the central and local governments as primary stakeholders; secondary stakeholders were scientists/academics, butchers, sellers, and consumers. The primary stakeholders selected were buffalo farmers, central and local governments, while secondary stakeholders consisted of scientists/academics, butchers, farmer sellers, and consumers. The selected indicators on the EES issue are economic indicators such as gross margin (GM), body weight, weaning weight, and reproduction (calf crop (%)); environmental indicators such as total grazing land use and waste disposal; and social indicators such total of buffalo, feeding procedures, mating system, cages, record keeping, time allocation for maintenance, social status and land use conflicts.

MACHINE LEARNING APPLICATION IN RESPONSE TO DISASTER RISK REDUCTION OF FOREST AND PEATLAND FIRE

Peat forest is a natural swamp ecosystem containing buried biomass from biomass deposits originating from past tropical swamp vegetation that has not been decomposed. Once it burns, smoldering peat fires consume huge biomass. Peat smoldering fires are challenging to extinguish. These will continuously occur for weeks to months. Experts and practitioners of peat smoldering fires are the most recommended effort to prevent them before they occur with the strategy: 'detect early, locate the fire, deliver the most appropriate technology.' Monitoring methods and early detection of forest and land fires or 'wildfire' have been highly developed and applied in Indonesia, for example, monitoring with hotspot data, FWI (Fire Weather Index), and FDRS (Fire Danger Rating System). These 'physical simulator' based methods have some weaknesses, and soon such methods will be replaced by the Machine Learning method as it is developing recently. What about the potential application of Machine Learning in the forest and land fires, particularly smoldering peat fires in Indonesia? This paper tries to answer this question. This paper recommends a conceptual design: impact-based Learning for Disaster Risk Reduction (DRR) of Forest, Land Fire, and Peat Smouldering.

Ecological and economic significance of swamp vegetation nursery for successful reforestation program: an insight from Bangladesh

ABSTRACT There is a growing interest in understanding and establishing forest nurseries in swamp ecosystem areas of Bangladesh. This study aims to evaluate the socio-economic and ecological contribution of swamp small-scale tree nurseries. The result revealed that government and non-government organizations established swamp nurseries in Bangladesh. Swamp nursery producer generates an annual average net profit of USD 4745. Small-scale swamp nursery owners benefited in multiple forms: subsistence, house construction, savings purposes, and, most importantly, expansion of their businesses. However, the ecological aspect of seedling production was not satisfactory because of the lack of facilities such as skilled labor supply, access to high-quality germplasm, technical skills, nursery facilities, etc. In the nurseries observed, only two dominant swamp tree species, locally known as Hijol (Barringtonia acutangular) and Koroch (Pongamia pinnata) seedlings were found. In most cases, those seedlings were morphologically unhealthy, and the root structure was deformed, which was identified as a major problem of reforestation programs in wetland areas. Therefore, to make the reforestation program successful and create livelihoods for the rural poor in the wetland areas, there is an urgent need to develop quality seedlings-based swamp nurseries, which are only possible through proper nursery management techniques.

Forest swamp succession alters organic carbon composition and survival strategies of soil microbial communities

Forest swamp ecosystems plays crucial role in the global carbon cycle. However, the effects of forest swamp succession on soil organic matter (SOM) and microbial community structure remain unclear. To determine the drivers of SOM change and soil microbial communities in forest swamp succession, a ‘space instead of time’ approach was used. Soil samples from 0 to 40 cm were collected along forest swamp (early stage), dried-up forest swamp (middle stage), and forest (late stage) ecosystems. Our findings reveal that as succession progresses, the relative content of aromatics decreases and SOM undergoes a transition towards a more readily degradable form. These changes affect soil carbon sequestration and nutrient availability. Bacterial diversity was significantly influenced by succession and changes in soil depth, with fungi exhibiting higher resilience. Soil properties and environmental conditions exert influence over the structure and function of microorganisms. As succession occurred, microbial interactions shifted from cooperation to competition, with bacteria displaying a deterministic distribution pattern and fungi exhibiting a random distribution pattern. SOM quality plays a key role in shaping microbial communities and influencing their growth strategies. Microorganisms are the major drivers of soil respiration, with K-strategist dominated communities in early succession exhibiting slower degradation rates, whereas r-strategists dominated in later stages, leading to faster decomposition.

Правовой режим водно-болотных угодий

Introduction. Wetlands are of great environmental and economic value, which determines the search for a reasonable compromise on the organization of their rational use and protection. In this regard, the purpose of the study is to analyze the current norms of international and Russian environmental law regulating the legal regime of wetlands in Russia. Methods. The methodological framework for the research is the dialectical method of scientific cognition, as well as the method of system analysis, logical, and comparative legal methods. Results. The analysis has shown the value of the eco-network approach to the rational use and protection of wetlands, laid down in the Ramsar Convention and partially reproduced in the Water Code of the Russian Federation and other legal acts. Meanwhile, some existing gaps have been identified in the legal regulation of the use and protection of swamp ecosystems, including issues of accounting and ownership of them, which require appropriate solutions. Conclusions. The full implementation of Russia’s obligations under the Ramsar Convention requires the development of programs for the use and protection of wetlands, the legislative consolidation of additional measures to account for wetlands that are not included in the Ramsar list, but require measures to preserve them. It is necessary to normalize the very concept of wetlands, as well as to expand the list of permits and prohibitions that apply to this natural complex. It is hardly advisable to include all wetlands in specially protected natural territories, therefore, further development of the regime of “semi-protected” natural territories for wetlands is necessary, in which the subjects of the Russian Federation should participate more widely.

Growth of Dyera polyphylla and Shorea balangeran Seedlings on Various Growing Media for Restoration Program

The success of peat swamp ecosystem restoration needs to be supported by the supply of good quality native plant species, one of which is influenced by the growing media. This study aimed to evaluate the effect of cocopeat, compost, and biochar as a mixture of peat media on the growth of Dyera polyphylla and Shorea balangeran seedlings in a greenhouse for six months. The experiment was carried out using a completely randomized design with one factor, growing media (100% peat as M1 (control); 70% peat + 30% cocopeat as M2; 70% peat + 30% compost as M3; and 70% peat + biochar 30% as M4). The survival rate of both types of seedlings in all growing media treatments was 100%. Dickson Quality Index (DQI) of D. polyphylla seedlings on M1, M2, M3, and M4 was 0.32, 0.29, 0.46, and 0.31, respectively, and for S. balangeran was 0.15, 0.10, 0.09, and 0.12, respectively. Adding cocopeat, compost, and biochar could increase the nutrient content of peat media. The growing media with the best quality for D. polyphylla was M3, while for S. balangeran was M1. Keywords: Dickson Quality Index, Dyera polyphylla, growing media, growth response, Shorea balangeran

Флора сосудистых растений болот Шантарского архипелага (Охотское море)

The authors present the results of a study on the vascular plants in the archipelago swamp ecosystems, which surpass a quarter (28.5 %) of the Shantar Archipelago flora. The article contains a list of swamp plants including 171 species from 106 genera and 44 families. The expose core of the swamp flora comprises most of the species (82.5 %). The spectrum of of the swamp partial flora leading families reflects its East Asian character in the conditions of the Pacific islands (Cyperaceae, Ericaceae, Ranunculaceae, Poaceae, Asteraceae, Rosaceae).