API src

Found 575 results.

Related terms

Schutz und Wiederansiedlung von Seegraswiesen in der südlichen Ostsee, Vorhaben: Fernerkundungsbasiertes Monitoring des Wiederansiedlungserfolges von Seegraswiesen

Schutz und Wiederansiedlung von Seegraswiesen in der südlichen Ostsee, Vorhaben: Einbindung von Nutzungsinteressen und Gesellschaft

Lachse in Brandenburg

Wiederansiedlungsprojekt für Großsalmoniden (Lachs, Meerforelle) in Brandenburg als Bestendteil des Projekts 'Elblachs 2000'. - Bisherige Besatzgewässer: Stepenitz, Ucker, Pulsnitz/Schwarze Elster. - Vorkommensrecherchen, Habitatklärugnen, Besatzmaßnahmen, Kontrolluntersuchungen, Rückkehrernachweis, Wiederherstellung, Durchgängigkeit, - Besatz (bis 2005): 370 000 Lachs-Brut, 66500 Junglachse, 240000 Meerforellen-Brut (Stepnitz), 500 000 Meerforellen-Brut (Ucker), 15700 Junglachse (Pulsnitz), - 1. Nachweis-Rückkehr: 2002-50 Lachse, 30 Meerforellen, 2003: 4 Lachse, 5 Meerforellen, 2004: 13 Lachse, 4 Meerforellen.

Ausbreitungsstrategien und Siedlungserfolg von Waldbodenpflanzen in forstlichen Rekultivierungsgebieten des Rheinischen Braunkohlenreviers (Nordrhein-Westfalen, BRD)

Im Bereich des Rheinischen Braunkohletagebaus stehen immer groessere Abraumflaechen zur forstlichen Rekultivierung an. Unter dem Gesichtswinkel einer moeglichst landschaftsgerechten und naturnahen Wiederbesiedlung wird der Wildpflanzenbestand seit 1983 systematisch verfolgt, wobei zunaechst ungewoehnlich hohe Artenzahlen zu verzeichnen waren (Pionier- und Ruderalarten). Da sich manche im Umland haeufigere Wildarten in den verschiedenen Forstkulturen jedoch auch nach mehreren Vegetationsperioden nicht wieder einstellten, wurden im Gebiet der Sophienhoehe als umfangreichster Abraumschuettung Mitteleuropas Anbauversuche mit 30 ausdauernden, heimischen, verhaeltnismaessig unempfindlichen, aber gewoehnlich bestandsbildenden Waldbodenpflanzen (zB Buschwindroeschen, Goldnessel, Moschuskraut) durchgefuehrt. Im Fordergrund der langjaehrigen Beobachtungen standen Vitalitaet, Biomasseproduktion, Ausbreitungsstrategie, Siedlungserfolg und Vergesellschaftung unter den gegebenen Standortsverhaeltnissen. Anhand der stark streuenden Ergebnisse wird derzeit versucht, ein Besiedlungsmodell fuer Aussenkippen und vergleichbare Rekultivierungsflaechen zu entwerfen.

Anechura bipunctata (Fabricius, 1781) Zweipunkt-Ohrwurm Ohrwürmer Vom Aussterben bedroht

Vom Zweipunkt-Ohrwurm gab es in Mittel-Deutschland vermutlich sowohl bodenständige Vorkommen als auch eingeschleppte Individuen, wobei erstere wohl bereits um 1900 ausgestorben waren und der letzte Altnachweis (Einschleppung?) von 1914 stammt (Reichert 1917; Klaus 2010). Erst 2002 und 2005 wurde die Art in Deutschland an zwei Stellen unweit der Grenze zu Österreich wieder entdeckt, im Osten in den Allgäuer Alpen (Werner 2005) und in der Mitte im Vorgebirge des Karwendel (Liston 2006 – einzelnes Männchen). In beiden Fällen ist von sehr kleinen Populationen auszugehen. Nur historische und fragwürdige Funde (Zacher 1917 und Harz 1957) bekannt. Eine Wiederbesiedlung dieser Fundorte ist sehr erschwert und eigentlich unmöglich ohne Wiederansiedlung.

Artemisia rupestris L. Felsen-Beifuß Farn- und Blütenpflanzen Vom Aussterben bedroht

Ähnlich wie bei Artemisia laciniata ist das reliktische Vorkommen in Thüringen vom Hauptareal im temperaten Asien hochgradig isoliert. Die Art ist Objekt von Artenschutzmaßnahmen (Erhaltungskultur, Wiederansiedlung). Der Bestand am einzigen Wuchsort (Reliktvorkommen) bestand 1979 aus einer einzigen verbliebenen Pflanze; die begonnene Erhaltungskultur besteht aus vegetativ vermehrtem Material dieser Pflanze.

Experiment on Germination Success of Injection-Based Zostera marina Sowing Methods in Aquaria

Seed-based restoration is a promising approach to accelerate the slow natural recolonization of Zostera marina meadows. In this study, seed-based restoration was investigated through the injection of seeds into the sediment using syringes. Parallel laboratory and field experiments were conducted to examine the germination success over time under both simulated and natural field conditions. A laboratory experiment was conducted in the climate chambers of GEOMAR Helmholtz Centre for Ocean Research Kiel. Twelve replicate aquaria, each containing 6 boxes of 18 cm*13 cm*18 cm, were set up in a climate chamber. Each plastic box in the aquaria was filled with 6 cm of sandy sediment collected from sandbanks next to seagrass meadows in Falckenstein near Kiel (54°23'39.4N 10°11'23.6E). For sterilization, the sediment was autoclaved at 121°C for 20 minutes before use. Water was changed weekly, with approximately 30% replaced by filtered (50 μm and 5 μm filter cascade) Baltic Sea water with an ambient salinity ranging from 14-16 PSU. The chamber simulated field conditions typical for the season, with 12 hours of light per day and a temperature of 10°C. In each box, a seed amount equivalent to the weight of 100 Zostera marina seeds was sown, based on the average seed weight determined prior to the experiment. Seeds were collected at two sites in Laboe and Falckenstein (Kiel Fjord) in July 2023 by snorkelers and scientific divers (Laboe: 54° 24' 48.53 N, 10° 13' 29.91 E; Falckenstein: 54° 23' 31.36 N, 10° 11' 31.15 E). They were overwintered in climate cabinets in darkness at 4°C and a salinity of 32 PSU, where they rotated every 6 hours for 1 minute. Different treatment combinations were tested, involving the factors Sowing Method (syringe (100 ml) with agar medium or Hand-Sown), Sowing Depth (2 cm or 4 cm), Origin of Seeds (Falckenstein or Laboe), and Fertilization of the Sediment (from the beginning, after germination, or none at all). The Hand-Sown method served as a control. To this end, the box was filled with about 4cm autoclaved sandy sediment. Then the seeds were evenly distributed on the surface and covered with either 2 cm or 4 cm of sediment before being gently lowered into the aquarium. For the syringe treatment, seeds were injected into the sediment embedded in an agar medium prepared by cooking Baltic Sea water with 1.8% agar (Agar-Agar, BioScience Grade, pulv., Carl Roth). Each syringe contained 90 ml crumbly agar, 10 g autoclaved sediment, 100 seeds and depending on the treatment, either 1g charcoal powder, nutrients (P and N) or no further additions. For the nutrients, according to the Redfield ratio N:P = 16:1, 100 μL of nitrogen and 10 μL of phosphorus were used per 90 mL of agar. There were three timing treatments for "Timing of Nutrients in the Sediment". "Nutrients from Beginning", "Nutrients after Germination" and "no Nutrients". The treatment was the same for all boxes within one aquarium to avoid potential influence on the surrounding water. As fertilizer "osmocote Langzeitdünger 6 Monate" (N P 19+9) was used. In the boxes with "Nutrients from Beginning", two pellets were inserted with tweezers into the sediment directly after sowing. In the boxes with "Nutrients after Germination", the same treatment started on April 29, 2024, after many of the seedlings had already developed some green leaves. The seeds were sown on March 4, 2024, and from March 21 to May 25, 2024, emerging seedlings were counted three times per week. Seedlings with only cotyledons and seedlings with developed green leaves were counted together in the beginning and separately from April 24, 2024, onwards.

Experiment on Germination Success of Injection-Based Zostera marina Sowing Methods in Kiel Fjord

Seed-based restoration is a promising approach to accelerate the slow natural recolonization of Zostera marina meadows. In this study, seed-based restoration was investigated through the injection of seeds into the sediment using syringes. Parallel laboratory and field experiments were conducted to examine germination success over time under both simulated and natural field conditions. A field experiment was conducted in the Kiel Fjord (Baltic Sea), next to Seebar. The experimental setup consisted of three quadrats (3x3 m) divided into 36 plots (0.5x0.5 m). Quadrat 4 was located at 54° 20' 52.10 N, 10° 09' 04.10 E, quadrat 5 at 54° 20' 52.70 N, 10° 09' 04.20 E and quadrat 6 at 54° 20' 52.30 N, 10° 09' 04.70 E. In each plot, a seed amount equivalent to the weight of either 100 or 500 Zostera marina seeds was sown, based on the average seed weight determined prior to the experiment. Seeds were collected at two sites in Laboe and Falckenstein (Kiel Fjord) in July 2023 by snorkelers and scientific divers (Laboe: 54° 24' 48.53 N, 10° 13' 29.91 E; Falckenstein: 54° 23' 31.36 N, 10° 11' 31.15 E). They were overwintered in climate cabinets in darkness at 4°C and a salinity of 32 PSU, where they rotated every 6 hours for 1 minute. Different treatment combinations were tested, involving the factors Sowing Method (syringe (100 ml) with agar medium or Hand-Sown), Sowing Depth (2 cm or 4 cm), Origin of Seeds (Falckenstein or Laboe), and Seed density (100 or 500 seeds per plot). The Hand-Sown method served as a control. To this end, a small trench with 2-4 cm depth was manually dug using a finger. Seeds were sown into the trench, which was then gently filled with sediment from both sides. For the syringe treatment, seeds were injected into the sediment embedded in an agar medium prepared by cooking Baltic Sea water with 1.8% agar (Agar-Agar, BioScience Grade, pulv., Carl Roth). Each syringe contained 90 ml of crumbly agar, 10 g of autoclaved sediment, 100 or 500 seeds and depending on the treatment either 1 g charcoal powder or nutrients (P and N) were added. For the nutrients, according to the Redfield ratio N:P = 16:1, 100 μL of nitrogen and 10 μL of phosphorus were used per 90 mL of agar. Each syringe contained 100 or 500 seeds and included either the addition of nutrients (P and N) or charcoal powder or no further additions. The seeds were sown by scientific divers on March 12, 14 and 18, 2024 and seedlings were counted on April 23, 2024 and May 23, 2024 to determine the germination rate and evaluate which sowing method was the most successful.

Bebauungsplan des Ortsteils Wietze W-27 Westlich der Schule

Gemeinde Wietze Die Gemeinde Wietze beabsichtigte mit der Planaufstellung die planungsrechtlichen Voraussetzungen zur Wiederansiedlung des Vollsortimenters in integrierter Lage im Ortskern zu schaffen und damit zur Weiterentwicklung eines Zentralen Versorgungsbereiches und zur Bildung eines Ortskernes beizutragen. SO Lebensmittelmarkt

Biberverbreitung und -bestandsentwicklung im Land Brandenburg

Verbreitung und die Bestandsentwicklung des Bibers im Land Brandenburg

1 2 3 4 5 … 56 57 58