Tag Archives: Ecosystems

Let my brew fool you.

In Fiordland, runoff from the unusually high rainfall creates a permanent tannin stained fresh water layer ranging in depth between 5cm and 10m on top of the salt water.

This dark fresh water layer prevents light from penetrating the ocean and as a consequence many marine species which are usually restricted to deep water (depth larger than 100 meters) flourish in shallow water (depths of less than 50 meters).

This allows recreational divers to observe species that normally live beyond their recreational dive depth range.

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Tannin stained fresh water floats on top of the heavier, warmer salt water below, Fiordland, New Zealand.

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Citizens, Residents and Overstayers

Due to New Zealand’s isolation from other large land masses, its natural ecosystems develop in rather unique ways.

It is well known that the only native land mammals are a few bat species, but less well known is that New Zealand has no native
eusocial bees or wasps, and very few native ants or termites.

Humans have accidentally introduced 4 social wasp species and about 30 ant species.

Honeybees and four species of bumblebees were deliberately introduced to pollinate crops.

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Bumble Bee (Bombus terrestris) on Lavender, Lower Hutt, New Zealand

 

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