Serious Insect Crisis

 When do we wake up?

Queen of Spain Fritillary/Storplettet Perlemorsommerfugl/ photo GB

Butterflies and other insects are rapidly declining everywhere in Europe - and not least in Denmark. Scientists point, among other things, to pesticides, monoculture and lack of space as reasons.
 
A new investigation published in the prestigious journal Science shows that the insects of Europe disappear -  this is even a talk about an ecological collapse. The German scientists have examined the insect occurrence in more than 100 nature reserves in western Europe - and the insects are extinct even in the nature reserves. The biomass of insects have fallen with more than 80 %.

The drastic decline for the insects of Europe could mean a decline in the number of birds, which has already been identified in Denmark, where since the 1970s four out of five partridges, three out of four lapwings and more than half the skylarks have disappeared. Huge areas - which earlier was nature- were ploughed without putting something else instead -  and at the same time we experience the climate changes.

Sad but true -many Danish politicians apparently do not care, on the contrary there is a support for that Denmark - as one of few countries of EU - fights against a ban on pesticides, ( because the Danish agriculture demands it), which could represent a risc both to ourselves and the wild bees.

It is said that the approval of spraying in Denmark is tough, but in the approval is alone considered if a substance is representing a risc for the ground water or if it is exceeding limits in our food. It is not  evaluated what happens upon the ground and it is not taken into account that herbicides like Roundup, which is the most used in Denmark,  simply removes all plant growth where it hits -  or that 2.500 tons various active substances are spread over 60 % of Denmarks area each year -  or that the agriculture is allowed to use almost 1.000 various products.

This means that organisms in the earth, the wild plants of the fields and the insects upon the plants and the birds who live by the insects are being pushed more and more in the intensive Danish farm land. This happens in a degree where we are the witness of a slow collapse of ecological balances in the whole open countryside. This also applies to nature reserves.

 


Source: Excerpt of article by Ella Maria Bisschop-Larsen, Præsident for Danmarks Naturfredningsforening, Journal "Natur og Miljø",  September 2017. 

Bumblebee/ photo:GB

An ecological study in Western Germany. 
The amount of insects collected by monitoring of traps in Orbroicher Bruch nature reserve in north west germany decreased by 78% in 24 years.


Each spring since 1989 insect traps have been set up in meadows and woodlands in Orbroicher Bruch nature reserve and 87 other nature areas in the West German state Nordrhein-Westfalen.

Recently the scientists presented alarming results: The average biomass of insects caught during summer was decreased from 1,6 kilo pr. trap in 1989 till only 300 gram pr. trap in 2014.

"The decline is dramatic and depressing and this applies to all kinds of insects, including butterflies, wild bees and hoverflies ", says Martin Sorg, who is entomologist from  Krefeld Entomological Society, which is responsible for the monitoring project.

Several other studies from the western part of the world support the results from Germany.

The insects disappear everywhere.






Grethe Bachmann
Source/ Natur og Miljø, September 2017 

The Honey Bee is in Danger

Life has gradually become an obstacle race for insects like honey bees - they live by flying from flower to flower and return to their large family with pollen and nectar which they change into honey.

Poison, slurry and gigantic corn fields do not harmonize with the bees' need for a clean environment with lots of flowers, bushes, trees and various crops. The development of the industrial agriculture has created a visible distance between the flowers in the landscape, and the population of Danish bee-families have gone from ab. 200.000 in the years around 1950 till ab. 80.000 in these years. The work of honey bees from early spring till late autumn is of crucial importance for the diversity in the nature.

The honey bees are among the most important assistants for the fertility of the flora. Also for the hundreds of plant species which are used in farming, foresting and in the gardens are the bee- pollination of crucial importance. Crops like winter rape and clover are completely dependent on the bee-pollination. Also all plants which seed, like fruit trees, berry-bushes and other similar plants. Danmarks Jordbrugsforskning (research) has estimated that the Danish honey bee- pollination only in the agriculture and in fruit and berry-cultivation represents a value of at least 1 billion kroner. The EU-commission is more concrete in its evaluation of the good deeds of the bees when it's about money. According to EU the bees' work represents ab. three billion kroner a year. (in DK) At the same time is concluded that the value of the pollination of the bees and the following fertility is 30-50 times higher than the value of the honey-production which in Denmark is ab. 60 million kroner a year.

The industrial agriculture has meant that the fields grew larger and larger. Stone-fences, earth banks and lots of hedgerows disappeared, and the distance between the small uncultivated oases for the flowers and bees grew longer and longer.



The verges and ditch-edges were once a study in a diversity of flowers which were good for the honey bees and other pollinating insects. Today are only few plant-species in those places. The heaths are attractive for the bees, but they are now in a crisis, caused by nutrient-rich precipitation. The nitrogen gives several grass species good living conditions at the expense of the heather.

The honeybee and all other pollinating insects lost terrain when 117.000 hectare fallow fields were ploughed and cultivated in 2008 - an area the size of the island Lolland simply disappeared as a habitat for bees.

All in all - the honey bee, the bumblebee, the butterflies and other pollinating insects are in danger. Some species have already disappeared never to return. Fewer pollinating insects will effect us more than we imagine right now - also in our daily economy. Fewer vegetables, berries, fruit will empty our pockets! So it's best for all of us, if there are more uncultivated places for bees, butterflies and other pollinating insects.

Source: Natur og Miljø, Danmarks Naturfredningsforening, Nr. 1, Jan Skriver, Honningbien.

photo March 2010: stig bachmann nielsen, Naturplan Foto

Nature in Trouble - our History Disappears

The law about edges
In Frederikshavn the local authority has warned the site owners that they will keep an eye on them if they cultivate the land too close to the edge of the water streams and that there will be consequences if they do.Too much earth, sand and fertilizers end in the water if the law about edges are not kept. 80 km water stream has been controlled in Frederikshavn municipiality, and at 26 site owners was pointed out an exceeding of the demand that there has to be 2 m cultivate-free edges along the water streams.


Nature Protection law §3.
Large sections of the small nature areas in the landscape disappears, although many places are protected by the Nature Protection-law §3. Many nature-protected water holes, meadows and pastures have been covered or ploughed up and made into farm land. It is illegal to destroy nature protected areas. The farmers can be punished with a fine or at worst prison for a year. However the municipalities acknowledge that supervision is insufficient. When the small biotopes in the farm land disappear it can spoil the living conditions for both birds, animals and plants in the Danish nature.



Too late for the nature-protected land
An actual case from Ringkøbing-Skjern shows that it can be without liability to punishment to destroy protected nature areas. 21 hectare §3-protected heath and pastures were ploughed up by a farmer. The offence was so crude that the environment and technical administration of the municipality recommended the politicians to report the site owner to the police and confiscate his profit. The politicians refused this, they remained a passive spectator and settled for that the site owner had just to re-establish the area. They claimed that they had now given a signal that it is not acceptable to cultivate nature-protected land. The farmer had expenses cultivating the field, they said, and now again because he was forced to stop. But it is not as simple as that. When a farmer destroys a nature area it is not an acceptabel solution that he's just asked to re-establish, which is impossible to do. It just means that he cannot cultivate it any more. He has already destroyed the place. It takes up till 50-100 year before the natural contents are back.




Crucial for the Flora and Fauna
A farmer had destroyed an erosion-valley from Ice Age and had picked out 3 other areas with pasture, before the local authority stopped the destruction. It was confirmed that the pastures had never been under plough. The areas cover the Nature Protection law §3, which is crucial for the protection of flora and fauna in the open land and thereby the protection of the biodiversity.


Our history disappears
The dikes disappear. The site owners remove the dikes, which is illegal. The Museum Law says that it is not allowed to change the situation of the dikes, to remove or make passage without a special dispensation. 44 dikes in Horsens area have disappeared. Dikes are historic leading lines in the landscape and visible signs of a part of Danish history, which goes back to Iron Age. The dikes are also important for our nature and animal life and a connecting link between nature areas. Therefore it is very important to keep them, says the Kulturarvsstyrelse. (Cultural heritage). Areas with meadows, heaths and pastures are retreating in Denmark and in the North. Cultivation, forestation and overgrowth have since the end of the 1800s halved the area. This development has meant that Denmark has lost some of its most species-rich nature types - the socalled light- open nature types and cultural biotopes.
West of Frederikshavn is an area with several hills from Bronze age and Stone age, but not quite as many now since a farmer according to Kulturarvsstyrelsen has destroyed many of the thousand years old prehistorics in the area. So not only nature disappears but also grave hills and Denmark's history. A bulldozer can in a few hours destroy what has been here for thousands of years.


Cultivation of set-aside fields removes habitats
Recently the farmers were allowed to cultivate their set-aside fields with a saddening result for the nature. A set-aside field with a rich flora is important to the pollinating insects and butterflies. It is crucial to the insects if the distance between the flora-fields is too long. They cannot survive loosing their habitats. This year I have noticed two set-aside fields in Mid Jutland with a beautiful view over a magnificent landscape and with lots of bumble-bees and butterflies, which have now been planted with fir. The bumble-bees and the butterflies are gone, and in a few years the beautiful view has gone too.



Source: Naturbeskyttelse


photo Jutland 2007-2008: grethe bachmann