Habitatwahl Von Küken Des Kiebitzes (Vanellus Vanellus) Im Ackerland
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Habitatwahl von Küken des Kiebitzes (Vanellus vanellus) im Ackerland Bachelorarbeit im Studiengang Naturschutz und Landnutzungsplanung Vorgelegt von Florian Braun Eingereicht am 06. September 2017, Neubrandenburg Erstgutachter: Prof. Dr. rer. nat. Mathias Grünwald – Hochschule Neubrandenburg Zweitgutachter: Dipl.-Biol. Dominic Cimiotti – Michael-Otto-Institut im NABU, Bergenhusen URN: urn:nbn:de:gbv:519-thesis2017-0515-1 Abstract Habitat selection of chicks of the Northern Lapwing (Vanellus vanellus) on arable land Habitat selection by Lapwing chicks in arable land was analyzed. Observations of chicks were made in four different regions of the North German lowlands during the breeding seasons of 2016 and 2017 as a part of the federal program for biodiversity of the German government. Points where chicks were observed (n=395) were compared with randomly selected points around the Lapwing points (n=395) to create habitat models. Lapwing chicks preferred places without vegetation or with low vegetation. There was also a preference for points close to places with stunted growth or wet features within fields. The proximity to usable ditches had a positive influence on the probability of habitat use by chicks. Chicks preferred fields planted with maize towards winter cereals or grassland. This could be explained by the high proportion of bare ground at those sites which was shown by the preference for unsown arable Land, too. Fields planted with winter cereals were only used when areas of crops with stunted growth were available. The proximity to forests was strongly avoided by the Lapwing chicks. These results about the habitat selection by the chicks may be used for the development of conservation measures in arable land. Further studies on food availability, especially on maize, could help for a better understanding of the habitat selection by the chicks. Inhaltsverzeichnis Abbildungsverzeichnis ................................................................................................................ 1 Tabellenverzeichnis .................................................................................................................... 3 Abkürzungsverzeichnis ............................................................................................................... 4 1. Einleitung .................................................................................................................. 5 2. Artvorstellung – Kiebitz (Vanellus vanellus L. 1758) .................................................... 7 2.1. Taxonomie und Merkmale ........................................................................................... 7 2.2. Bestand, Verbreitung und Gefährdung ........................................................................ 8 2.3. Zugverhalten .............................................................................................................. 10 2.4. Lebensraumansprüche und Habitatwahl zur Brutzeit ............................................... 11 2.5. Brutökologie ............................................................................................................... 13 2.6. Kiebitzküken ............................................................................................................... 14 2.6.1. Einflüsse auf die Überlebensrate der Kiebitzküken ............................................ 15 3. Material und Methoden .................................................................................................. 19 3.1. Untersuchungsgebiete und naturräumliche Gliederung ........................................... 19 3.2. Beteiligte Institutionen und Personen ....................................................................... 20 3.3. Beschreibung der erhobenen Parameter und Datenaufnahme im Gelände ............ 21 3.3.1. Kiebitz-Punkt ....................................................................................................... 23 3.3.2. Zufallspunkt ......................................................................................................... 23 3.3.3. Küken oder Junge führendes Weibchen ............................................................. 24 3.3.4. Kükenalter ........................................................................................................... 24 3.3.5. Vegetationshöhe ................................................................................................. 25 3.3.6. Feldfrüchte / Habitate ......................................................................................... 25 3.3.7. Andere Sonderstrukturen ................................................................................... 25 3.3.8. Grünland ............................................................................................................. 26 3.3.9. Nutzbare Gräben ................................................................................................. 26 3.3.10. Strukturübergänge .............................................................................................. 26 3.3.11. Nassstellen .......................................................................................................... 26 3.3.12. Fehlstellen ........................................................................................................... 27 3.3.13. Gehölze ............................................................................................................... 27 3.3.14. Schlaggröße ......................................................................................................... 28 3.4. Datenumfang ............................................................................................................. 28 3.5. Statistische Auswertung ............................................................................................. 29 3.5.1. Habitatmodell für Kiebitzküken .......................................................................... 29 4. Ergebnisse ........................................................................................................................ 32 4.1. Datenanalyse der einzelnen Umweltfaktoren ........................................................... 32 4.1.1. Unterschiede in der Verteilung der Daten .......................................................... 32 4.1.2. Alter der beobachteten Küken ............................................................................ 33 4.1.3. Vegetationshöhe ................................................................................................. 34 4.1.4. Feldfrüchte / Habitate ......................................................................................... 34 4.1.5. Andere Sonderstrukturen ................................................................................... 35 4.1.6. Grünland ............................................................................................................. 36 4.1.7. Nutzbare Gräben ................................................................................................. 37 4.1.8. Strukturübergänge .............................................................................................. 37 4.1.9. Nassstellen .......................................................................................................... 39 4.1.10. Fehlstellen ........................................................................................................... 40 4.1.11. Gehölze ............................................................................................................... 41 4.1.12. Schlaggröße ......................................................................................................... 42 4.2. Multifaktorielle Datenanalyse .................................................................................... 42 4.2.1. Modellauswahl nach AIC-Wert ........................................................................... 43 4.2.2. Modelle 1 - 4 nach Regionen .............................................................................. 43 4.2.3. Modell 5 – „Distanz zu Fehlstellen“ .................................................................... 44 4.2.4. Modell 6 – verschiedene Übergangsvariablen ................................................... 45 4.2.5. Modell 7 – Nassstellen ........................................................................................ 46 4.2.6. Modell 8 – Küken älter 14 Tage .......................................................................... 47 5. Diskussion ........................................................................................................................ 48 5.1. Beschreibung eines optimalen Aufzuchthabitats ...................................................... 48 5.2. Landschaftsstrukturen ............................................................................................... 49 5.2.1. Vegetationshöhe ................................................................................................. 49 5.2.2. Feldfrüchte / Habitate ......................................................................................... 49 5.2.3. Andere Sonderstrukturen ................................................................................... 50 5.2.4. Grünland ............................................................................................................. 51 5.2.5. Nutzbare Gräben ................................................................................................. 51 5.2.6. Strukturübergänge .............................................................................................