Showing posts with label pests. Show all posts
Showing posts with label pests. Show all posts

18.1.17

Healthy Riverbanks Booklet: The Turtle, The Cattle and The Indian Myna


After the mass kill event in 2015 of the critically endangered Bellinger River Snapping Turtle, various authorities have now resorted to making information and activities available to property owners and other stakeholders in the catchment area.

The Bellinger River System Landholder Booklet (pdf) is also available in the dead tree version.

It seems that the introduced Indian Myna (pdf) is symbiotic with the cattle business and roads as they spread along with the precooked ungulates standing mostly without shade in severe heatwave conditions.

Meanwhile the drought continues...

1.7.15

The Anthropocene Biosphere


Humans are transforming Earth in absolutely unprecedented ways.

A study shows how homo sapiens has radically changed their natural home, planet Earth and has "caused shifts in world ecosystems unprecedented in the last 500 million years." (source)
  • Similar to the Great Oxygenation Events 2.3 billion years ago, human impact has produced a new kind of biosphere.
  • Intervention in the diversity of life has been the greatest for the past half billion years.
  • Our only home, planet Earth is entering a new kind of planetary state

Some of the key changes are:
•         "The homogenisation of species around the world through mass, human-instigated species invasions – nothing on this global scale has happened before

•         One species, Homo sapiens, is now in effect the top predator on land and in the sea, and has commandeered for its use over a quarter of global biological productivity.  There has never been a single species of such reach and power previously

There is growing direction of evolution of other species by Homo sapiens

•         There is growing interaction of the biosphere with the ‘technosphere’ – a concept pioneered by one of the team members, Professor Peter Haff of Duke University - the sum total of all human-made manufactured machines and objects, and the systems that control them" (source)

 M. Williams, J. Zalasiewicz, P. Haff, C. Schwagerl, A. D. Barnosky, E. C. Ellis. The Anthropocene biosphere. The Anthropocene Review, 2015; DOI: 10.1177/2053019615591020



Afterthoughts:
The global homogenisation of flora and fauna is obvious. People support a world full of poodles and horticultural weeds. They do not appreciate the endemic biodiversity of the place they dwell in. The eradication of bio-diversity is replaced with a monoculture.

Only one species (Homo sapiens) grabs 40% of net primary production

Burning fossil fuels and biomass seems an unstoppable addictive behaviour. We would rather burn to death, than modify our way of life.



Humans dictate the evolution of all other species, also having a go at their own imperfections.

We are constructing a gestell/ artifact that "could persist over geological timescales, an interaction of the biosphere with the technosphere (the global emergent system that includes humans, technological artefacts, and associated social and technological networks)." (source)


This noosphere (mind sphere) or a distributed agency seeks to expand the domination of space as well as planet Earth.

Spaceship Earth is fully in the hands and the code of the human helmsman. While vandalising the cradle of humanity and depriving the rest of life of a habitable planet, man steers for the goal of more and more.



Images:
The face of man, graffiti EU


Update:
Clive Hamilton, The Banality of Ethics in the Anthropocene, Part 1, Part 2

5.11.13

Bats and birds increase crop yield in tropical agroforestry landscapes


"Ecology Letters": Bats and birds increase crop yield in tropical agroforestry landscapes. Abstract
 
"We found that bat and bird exclusion increased insect herbivore abundance, despite the concurrent release of mesopredators such as ants and spiders, and negatively affected fruit development, with final crop yield... Our results highlight the tremendous economic impact of common insectivorous birds and bats, which need to become an essential part of sustainable landscape management."


Insect-munching bats spare the chemicals. abc 240305

"Farmers can reduce the need to spray their crops with insecticide by encouraging insect-eating bats to roost in old hollow trees in their properties...There are about 90 species of bats in Australia, three quarters of which subsist solely on insects and spiders...The smallest species of bat in south-eastern Australia is the little forest bat (Vespadelus vulturnus), weighing in at just four grams. It gorges itself on mosquitos, while the southern free tailed bat (Mormopterus) feasts on the destructive Rutherglen, or seed bug ( Nysius vinitor)."

"Many farmers are unaware of the benefits of insect-eating bats... and often don't even know they have the tiny nocturnal mammals on their properties. Dr Lindy Lumsden "is encouraging them to preserve old dead trees on their properties so that bats can roost and breed in their hollow trunks...People often see a dead tree as just being good for firewood or a bit of an eyesore and cut them down...The main thing that farmers can do is maintain the remnant vegetation on their properties so the bats can breed themselves up....It takes around 80 to 100 years for tree hollows to develop, so farmers need to revegetate to ensure the trees that fall down and die, leaving bats homeless, are replaced in years to come."

Images:
Pisanello, Detail of Madonna of the Quail, 1420
Kaki Persimmon fruit, (Diospyros kaki)

Updates:
Native birds provide crop benefits, but Australian farmers treat them as a pest, abc 022014 

"Effects of land use on bird populations and pest control services on coffee farms” Railsback, S. F. and M. D. Johnson. Proceedings of the National Academy of Sciences USA, DOI: 10.1073/pnas.1320957111.  042014

Downturn in shade-grown coffee putting forests, wildlife, people at risk, mongabay, 07.2014

Shade coffee is for the birds 05022015

 Why shade-grown coffee is good for birds and farmers, The Conversation 26.02.2015