Oribatid mites (Oribatida, Acari) in the forests of the northeastern lowlands of Germany and their reaction to different aspects of forest conversion [Elektronische Ressource] / vorgelegt von Eileen Kreibich

Eileen Dengler

Informations

• Publié par: ernst-moritz-arndt-universitat_greifswald
• Publié le: 01 janvier 2007
• Nombre de lectures: 42
• Langue: English
• Poids de l'ouvrage: 11 Mo

Extrait

Oribatid mites (Oribatida, Acari) in the forests of the northeastern
lowlands of Germany and their reaction to different aspects of forest
conversion





Inauguraldissertation

Zur Erlangung des akademischen Grades
Doctor rerum naturalium (Dr. rer. nat.
an der Mathematisch-Naturwissenschaftlichen Fakultät
der Ernst-Moritz-Arndt-Universität






vorgelegt von Eileen Kreibich
geboren am 11. Februar 1974 in Marienberg












































Dekan: …………………………………
Erstgutachter: …………………………………
Zweitgutachter:
Tag der Promotion: i
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Contents

1 INTRODUCTION..............................................................................................................1
2 METHODS........................................................................................................................4
2.1 Sampling.................................................................................................................................................................... 5
2.2 Extraction and sorting ............................................................................................................................................. 7
2.3 Preparation and determination............................................................................................................................... 8
2.4 Abiotic data............................................................................................................................................................... 9
2.4.1 Climatic data ......................................................................................................................................................... 9
2.4.2 Soil water content.................................................................................................................................................. 9
2.4.3 Acidity (pH) 9
2.4.4 C/N ratio.............................................................................................................................................................. 10
2.4.5 Soil profiles....................................... 10
2.4.6 Climate data..................................... 11
2.5 Statistical analysis................................................................................................................................................... 11
2.5.1 Abundance.................................... 11
2.5.2 Dominance 11
2.5.3 Constancy and frequency .................................................................................................................................... 12
2.5.4 Diversity (Shannon-Weaver-index)..................................................................................................................... 12
2.5.5 Evenness ............................................................................................................................................................. 13
2.5.6 Jaccard index....................................................................................................................................................... 13
2.5.7 Renkonen index................................................................................................................................................... 13
2.5.8 Wainstein index................................................................................................................................................... 14
2.5.9 Cluster analysis ................................................................................................................................................... 14
2.5.10 Correlation-analysis according to SPEARMAN ................................................................................................ 14
2.5.11 Correspondence analysis................................................................................................................................ 14
2.6 Area-based analysis of the horizontal distribution .............................................................................................. 15
3 SAMPLING AREA .........................................................................................................16
3.1 The Müritz NP........................................................................................................................................................ 16
3.2 Eberswalde.............................................................................................................................................................. 19
4 RESULTS AND DISCUSSION.......................................................................................22
4.1 The characterisation of the sampling plots........................................................................................................... 22
4.1.1 The young pine stand on plot M-pi-yng .............................................................................................................. 22
4.1.2 The medium aged pine stand on plot M-pi-med.................................................................................................. 23
4.1.3 The medium aged mixed stand on plot M-pibe-med1......................................................................................... 25
4.1.4 The medium aged mixed stand on plot M-pibe-med2......... 27
4.1.5 The older mixed stand on plot M-pibe-old1........................................................................................................ 28
4.1.6 The older mixed stand on plot M-pibe-old2 30
4.1.7 The beech stand on plot M-be-old....................................................................................................................... 32
4.1.8 The pure pine stand with high nutrient content in the soil E-pi-med1................................................................. 33
4.1.9 The pure pine stand with medium nutrient content in the soil on plot E-pi-med2............................................... 35
4.1.10 The mixed stand with a high nutrient content in the soil on plot E-pibe-med1.............................................. 36
4.1.11 The mixed stand with a medium nutrient content in the soil on plot E-pibe-med2 ........................................ 38
4.1.12 The beech stand on plot E-be-med.................. 39 ii
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4.2 Climate .................................................................................................................................................................... 40
4.3 Development direction of soil, humus and abiotic data within the different treatments .................................. 42
4.3.1 Treatment “Forest conversion”............................................................................................................................ 42
4.3.2 Treatment “Age stages” ...................................................................................................................................... 43
4.3.3 Treatment “Nutrient content of the soil” ............................................................................................................. 44
4.4 Investigation of the horizontal distribution in 2002............................................................................................. 45
4.4.1 Soil water content................................................................................................................................................ 47
4.4.2 pH values ............................................................................................................................................................ 48
4.4.3 C/N ratio........................................ 49
4.4.4 Thickness of the humus layer.............................................................................................................................. 50
4.5 The ecological characteristics of each studied species ......................................................................................... 52
4.5.1 Hypochthonioidea BERLESE, 1910....................................................................................................................... 52
4.5.1.1 Hypochthoniidae BERLESE, 1910 .............................................................................................................. 52
4.5.1.2 Eniochthoniidae GRANDJEAN, 1947 .......................................................................................................... 55
4.5.1.3 Mesoplophoridae EWING, 1917................................................................................................................. 57
4.5.2 Phthiracaroidea PERTY, 1841............................................................................................................................... 57
4.5.2.1 Phthiracaridae PERTY, 1841 ...................................................................................................................... 57
4.5.3 Euphthiracaroidea JACOT, 1930 59
4.5.3.1 Euphthiracarida