Kleiner Bullensee

Of natural Moorsee

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Of natural Moorsee

The Bull lakes (two lakes: Big and Small Bullensee ) emerged as a relic of a Pleistocene glacier in the Wümme lowlands south of Rotenburg ( Wümme) and north of Kirchwalsede. The Bull lakes are located one half each to the municipal areas of the town of Rotenburg (Wümme ) and the community Kirchwalsede. The Little Bullensee is included in the nature reserve " Large and White Moor ".

The Bull Lake as a recreational area

Due to the high humic substances due to the swampy area live in the lakes no fish. The Little Bullensee and the environment of the Great Bull Lake are designated as a nature reserve since 1938 and also as a recreational area around Bremen / Rotenburg ( Wümme) known. Therefore, there is also a cottage colony here. Similarly, the EWE AG has Bullensee on a property. In addition, the DLRG ( local group Rotenburg Wümme) has on the Great Bullensee a rescue station with a tower in order to increase the safety of bathers on weekends.

Through the dark, swampy water and the vast areas of shallow water, the temperature rises quickly in sunlight. In summer there is thus close to the shore often " bath temperature " to 30 ° C. Depending on the distance from shore and water depth then come to temperature differences of about 5 ° C.

Etymology

The name of the two lakes probably derives from the Low German verb roar from, which means as much as rumble or roar. The lakes could then be associated with poltergeists or spirits noisy flocks from the time of superstition.

Rewetting of the nature reserve

In recent years, attempts have been made to the rewetting of partially dewatered White and Great Moor back stronger. 2002 there was an explosion of the algae Vacuolaria virescens, but was not directly related to this Wiedervernässungsmaßnahme. Where the necessary nutrients have come, but it is unclear. Maybe they were whirled up from the lake bottom, introduced by the many bathers, flushed from ground water or washed out of the surrounding terrain in the lake due to heavy rains in 2002.

To rule out the ultimate reason for future green algae, a trench around the Great Bullensee was applied, the surface water following heavy rains from the neighboring moor, at least at these points, should hold back.

Flora and Fauna

Among the peculiarities of the flora of the lakes Bull owns the occurrence of all three occurring in Central European species of sundew, including the rare long-leaved sundew (Drosera anglica ). The herpetofauna is ( Natrix natrix ), among others, grass snakes and the surrounding conservation area and occurrence of the adder (Vipera berus ) as well as various Froschlurchpopulationen represented.