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Assessment of biodiversity and environmental quality using macrozoobenthos communities in the seagrass meadow (Gulf of Gdańsk, southern Baltic)

Anna H. Dąbrowska
Anna H. Dąbrowska
, 
Urszula Janas
Urszula Janas
 und 
Halina Kendzierska
Halina Kendzierska
   | 22. Juni 2016
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Article Category: Original research paper
Online veröffentlicht: 22. Juni 2016
Seitenbereich: 286 - 294
Eingereicht: 20. Juni 2015
Akzeptiert: 21. Okt. 2015
DOI: https://doi.org/10.1515/ohs-2016-0024
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© Faculty of Oceanography and Geography, University of Gdañsk, Poland. All rights reserved.
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Percentage of each taxon in the mean abundance on different substrates (others – <10%)
Percentage of each taxon in the mean abundance on different substrates (others – <10%)

Figure 2

Percentage of each taxon in the mean biomass on different substrates (others – <10%)
Percentage of each taxon in the mean biomass on different substrates (others – <10%)

Figure 3

The number of taxa (A), abundance (B) and biomass (C) on bare sand (Sand) and on the bottom covered with vascular plants (Plants + sand) (the asterisk indicates statistically significant differences: p<0.05)
The number of taxa (A), abundance (B) and biomass (C) on bare sand (Sand) and on the bottom covered with vascular plants (Plants + sand) (the asterisk indicates statistically significant differences: p<0.05)

Figure 4

Values of H’ (A) and J’ (B) on bare sand (Sand) and on the bottom covered with vascular plants (Plants + sand) (the asterisk indicates statistically significant differences: p<0.05)
Values of H’ (A) and J’ (B) on bare sand (Sand) and on the bottom covered with vascular plants (Plants + sand) (the asterisk indicates statistically significant differences: p<0.05)

Figure 5

Benthic Quality Index (BQI) on bare sand (Sand) and on the bottom covered with vascular plants (Plants + sand) (the asterisk indicates statistically significant differences: p<0.05)
Benthic Quality Index (BQI) on bare sand (Sand) and on the bottom covered with vascular plants (Plants + sand) (the asterisk indicates statistically significant differences: p<0.05)

Figure 6

Environmental quality on Dluga Mielizna based on the Benthic Quality Index (BQI)
Environmental quality on Dluga Mielizna based on the Benthic Quality Index (BQI)

Sensitivity of taxa used for calculating the Benthic Quality Index (BQI), where 1 = tolerant and 15 = very sensitive

Sensitivity value (Si) Taxa
1 Oligochaeta, Insecta larvae ind.
5 all polychaetes, Hydrobiidae, Macoma balthica
10 Amphibalanus improvisus, Cyathura carinata, Idotea chelipes, Idotea granulosa, Jaera spp., Corophium multisetosum, all gammarids, Theodoxus fluviatilis, Cerastoderma glaucum, Mya arenaria, Mytilus edulis
15 Idotea balthica, Bathyporeia pilosa, Crangon crangon

Frequency of occurrence (%) of taxa on Długa Mielizna on bare sand (Sand), vegetation-covered sand (Plants + sand) and on plants (Plants) (in bold – taxa observed only in places with plants)

Species Sand Plants + sand Plants
Nematoda 7 75 76
Oligochaeta 53 100 82
Piscicola pojmanskae Bielecki, 1994 0 0 29
Hediste diversicolor (O. F. Müller, 1776) 87 100 82
Marenzelleria spp. Mesnil, 1896 40 81 12
Pygospio elegans Claparéde, 1863 80 94 12
Amphibalanus improvisus (Darwin, 1854) 0 13 29
Mysis relicta Lovén, 1862 0 0 6
Praunus flexuosus (Müller, 1776) 0 0 6
Cyathura carinata (Krøyer, 1847) 13 19 6
Idotea balthica (Pallas, 1772) 0 13 100
Idotea chelipes (Pallas, 1766) 27 94 100
Idotea granulosa Rathke, 1843 0 13 41
Idotea juv. 0 25 100
Jaera spp. Leach, 1814 0 6 35
Bathyporeiapilosa Lindström, 1855 7 0 0
Corophium multisetosum Stock, 1952 20 13 6
Gammarus inaequicauda Stock, 1966 0 0 6
Gammarus locusta (Linnaeus, 1758) 7 13 41
Gammarus oceanicus Segerstråle, 1947 0 0 18
Gammarus zaddachi Sexton, 1912 0 25 53
Gammarus tigrinus Sexton, 1939 13 25 29
Gammarus salinus Spooner, 1947 0 50 88
Gammarus spp. Fabricius, 1775 0 0 12
Gammarus juv. 7 44 100
Crangon crangon (Linnaeus, 1758) 7 6 6
Insecta larvae ind. 7 81 88
Theodoxus fluviatilis (Linnaeus, 1758) 0 6 6
Hydrobiidae Stimpson, 1865 100 100 100
Cerastoderma glaucum (Bruguiére,1789) 20 81 65
Macoma balthica (Linnaeus, 1758) 67 81 24
Mya arenaria Linnaeus, 1758 80 100 53
Mytilus edulis Linnaeus, 1758 27 94 100
Einhornia (Electra) crustulenta (Pallas, 1766) 7 0 24
fish eggs and larvae 0 0 12
Gobiidae 0 0 24
Total number of taxa 19 24 31

Class ranges on bare sand (Sand) and on the vegetation-covered bottom (Plants + sand)

Class range
Sand 5.8-4.6 4.5-3.4 3.3-2.2 2.1-1.0 <1
Plants+sand 8.4-6.7 6.6-5.0 4.9-3.3 3.2-1.6 <1.6
Very good Good Moderate Poor Bad
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