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  • Biology-Online • View forum - Ecology
    14 pm Ecotourism 3 Thu Mar 09 2006 7 28 pm Effects on the ecosystem the canso causeway had 0 Wed Mar 08 2006 10 22 pm hear the spring peepers endangered 44 Mon Mar 06 2006 11 20 pm Go to page 1 2 3 4 predator in an ecosystem 10 Mon Mar 06 2006 8 54 pm Atlantic salmon any good websites with info on this specie 0 Thu Mar 02 2006 11 04 am Crossword Help Non living in 7 letters 6 Sun Feb 26 2006 5 13 pm sympatric v syntopic a question of scale 0 Wed Feb 15 2006 4 38 am problems on Ecology 3 Wed Feb 08 2006 7 52 pm Endangered Species 5 Sat Feb 04 2006 2 41 pm QUestion ABout Ecology 1 Fri Dec 30 2005 2 46 am biosphere limit hlp pls importunate 1 Wed Dec 14 2005 8 14 pm Ecology 2 Mon Nov 28 2005 2 22 pm Energy transfer 5 Wed Sep 28 2005 4 56 am Ecology Word Defination 2 Fri Sep 23 2005 9 35 am White Moose MNR public consultation period 0 Fri Sep 16 2005 3 22 pm Holistic ecology 1 Mon

    Original URL path: http://www.biology-online.org/biology-forum/topic-21-325.html (2016-02-17)
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  • Biology-Online • View topic - Why Forest Are Necessary?
    to whether the depths of the sea are loosing more oxygen Because this is where the danger of a planetary loss of oxygen would first show up Reply with quote qaism123 qaism123 Posts 1 Joined Sat Oct 04 2014 9 03 pm Sat Oct 04 2014 9 06 pm After all in our modern world where so much organic material is moving backwards and forwards between continents containment of pest species isn t really an option anyway Reply with quote BasicBiology BasicBiology Posts 26 Joined Wed Jul 30 2014 2 27 am Location New Zealand Website Thu Oct 30 2014 7 26 pm Forests are important for a whole heap of reasons and not just from an ecological perspective In addition to what people have already said maintain biodiversity cleaning air and water producing oxygen they provide habitat for a heap of birds mammals and invertebrates they provide food timber and fibers planted forestry is a billion dollar industry that provides work for masses of people they help to prevent floods and stabilize soil to prevent erosion take up CO2 from the atmosphere and store it in plant tissue and trap sediment and nutrients to prevent them entering waterways which helps maintain the quality of lakes and rivers As you ve already said they are important culturally and for recreation for example people enjoy going hiking mountain biking and hunting in forests They have an aesthetic appeal many people just enjoy spending time in forests and simply appreciate the intrinsic value of natural forest I m sure there are many more reasons Reply with quote BasicBiology BasicBiology Posts 26 Joined Wed Jul 30 2014 2 27 am Location New Zealand Website Sun Nov 16 2014 10 12 pm http basicbiology net environment land forest php Reply with quote JackBean JackBean Posts 5694 Joined Mon Sep 14 2009 7 12 pm Tue Dec 23 2014 5 40 pm No forests are not the lungs of the worlds the oceans are I m not sure about that per area production but in total oceans are much more important as they constitute 70 of the Earths surface But still what hasn t been said probably yet forests are very important for the ecology and for keeping the climate And I don t mean the CO2 bullshit now but more generalaspects Reply with quote GustavClark GustavClark Posts 3 Joined Wed Sep 02 2015 9 48 am Wed Sep 02 2015 11 39 am Don t think like an economist Forests are no more necessary than anything they just are They are necessary for humans in several ways 1 They can be cut down and burnt 2 They provide a reserve of land that isn t built over so sometime in the future developers can do just that 3 They look good in tourist brochures Over the last 20 30 years they have been seen to be important for these reasons 1 Locking up carbon 2 Preventing the melting of permafrost 3 Holding back rainfall

    Original URL path: http://www.biology-online.org/biology-forum/about28783.html (2016-02-17)
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  • Biology-Online • View topic - Ecological Niche
    the habitat it occupies e g both a wolf and the wolf spider are predators So they occupy the same ecological niche albeit in a different habitat even though they can live together in the same area the habitat of the spider is of course much smaller than that of the wolf While the lynx and the wolf could occupy the same ecological niche which means they then would have to compete for the same resources prey So there can be ecological niches such as predator herbivore detrivore etc Reply with quote sakshitah sakshitah Posts 1 Joined Tue Mar 11 2014 8 04 am Re Ecological Niche Tue Mar 11 2014 8 08 am Niche is usually defined as a way organism lives its life Reply with quote Gannet Gannet Posts 10 Joined Fri Jan 03 2014 1 32 pm Location Baltimore MD Re Ecological Niche Tue Mar 11 2014 9 44 am The definition I like is from http www nps gov glba forteachers marine environment instructional resources htm Ecological Niche The way a species makes its living where it lives what it consumes and how it avoids consumption by predators or displacement by other species however for completeness I would also include procreate while searching for the source of this definition I came across this http www montana edu screel Webpages Bio 20303 Biol 20303 20niches pdf From Mitchell Paul Ecology 101 Key Ideas NTC Publishing Group Chicago IL 2000 p069 There is no such thing as the ecological niche there are at least three current and quite different uses of this abstract and enigmatic concept Reply with quote Sapiens Sapiens Posts 2 Joined Tue Jul 07 2015 8 10 pm Wed Jul 08 2015 12 22 am ecowiki lists 4 Grinnellian niche The Ecologist J Grinnell was the first to use the term niche to describe the relationship between a species and its environment His conceptualization pictured the niche as being the sum of the habitat requirements of a species Niches in his view could be differentially occupied and vacated by species Grinnell 1917 Eltonian niche C Elton is most famous for his work on understanding the flow of energy throughout ecosystems via food webs He devised a niche concept that was based on the role of a species in its environment in terms of its position within a food web Elton 1927 Hutchinsonian niche G E Hutchinson perhaps the most famous Ecologist who ever lived developed a fully quantitative and revolutionary conception of the niche based partly on the work of G F Gause who developed the competitive exclusion principle He suggested that the niche could be represented mathematically as an n dimensional hyper volume whose dimensions corresponded to resource environmental gradients over which the species in question was distributed in some uni modal fashion The niche according to Hutchinson could be divided into two facets the realized niche which is the sum of a species niche dimensions that are unique to that particular species if

    Original URL path: http://www.biology-online.org/biology-forum/about22150.html (2016-02-17)
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  • Biology-Online • View topic - PLANARIAN help please :)
    exactly how far down his body must i cut for example do i have to cut it beyond the neck half way down its body etc and any other details are greatly appreciated Reply with quote mith mith Posts 5345 Joined Thu Jan 20 2005 8 14 pm Location Nashville TN Website Tue Oct 23 2007 8 51 pm I think they re pretty resilient in general Reply with quote LittleBeaver LittleBeaver Posts 13 Joined Tue Jan 15 2008 5 20 pm Wed Jan 23 2008 9 03 pm You could begin by using an anesthetizing agent or have someone hold it with tweezers and paper towels to make it be still so you can make your cuts There are a number of ways to make it grow two heads cut off the head around the neck region then make a midline cut starting at the neck region down to the about the last 2 5 of the remaining body length or cut a middle to posterior chunk about 1 3 of its body length and throw away the head the tail or cut off its head at the neck then starting from the tail make a midline cut up to the neck but leaving a short connecting region These will all give different shapes that can come out looking very cool Good luck Reply with quote DoctorStein DoctorStein Posts 68 Joined Fri May 30 2008 9 27 am Re PLANARIAN help please Fri May 30 2008 11 14 am You can learn from this picture What a sweet creature Reply with quote JamesJX JamesJX Posts 1 Joined Fri Feb 20 2015 7 40 am Fri Feb 20 2015 7 42 am There are a variety connected with methods to ensure it is expand 2 heads stop the top round

    Original URL path: http://www.biology-online.org/biology-forum/about12037.html (2016-02-17)
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  • Biology-Online • View topic - Please read! About life history strategies!
    My first thought would be that r selection strategy would be the most the most successful mostly because it sounds like there is a high amount of variability in the environment Reply with quote Youngji Youngji Posts 4 Joined Sun Jan 11 2015 11 00 am Re Please read About life history strategies Sun Jan 11 2015 11 30 am I agree with basic biology here R selection will result in the best overall fitness for such a species There are a number of clues in the question that help elucidate the ecology of this given species we shall call A Now A being an annual species has a very short life history Its entire life cycle will be completed in a year or less and thus we might presume that during this time it has to go about its business of development maturation and reproduction Typically such a species will be semelparous growing throughout its life and reproducing only near the end of its life cycle producing a large number of offspring in one bout Naturally due to the short life cycle there is no overlap of generations and the the only investment in each offspring is in the form of food reserves If this sounds familiar to you they are the characteristics of an r selected species Large number of offspring low amount of parental investment This is the most optimal strategy for an annual species as due to the life cycle there is a little opportunity for repeated reproduction and b Little opportunity for parental care All of this deduced from just the fact that A is an annual species Moving on given that the environment is highly variable it appears that investment in a small number of offspring will not be optimal due to the risk

    Original URL path: http://www.biology-online.org/biology-forum/about41201.html (2016-02-17)
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  • Biology-Online • View topic - Help with the basic understanding of Ecosystems
    the conditions in which a person animal or plant lives or operates So do different ecosystems have different environments Like would a small pond IN a forest be two separate ecosystems Or a river IN a rainforest would the river and the rainforest be two different ecosystems 2 And also I read that ecosystems can be as small as a pond in your garden but other ecosystems can be as big as a country spanning forest So what distinguishes how large an ecosystem is And how do you distinguish between one ecosystem from another ecosystem Thanks for your help Reply with quote BasicBiology BasicBiology Posts 26 Joined Wed Jul 30 2014 2 27 am Location New Zealand Website Wed Sep 24 2014 8 06 am Yep that s pretty much it A lake within a forest is two different ecosystems and the same goes for a river running through rainforest The boundaries of an ecosystem are basically defined by different types of environments so the size of ecosystem is governed by how large the area is where the environment is relatively similar Obviously you get different environmental conditions within ecosystems e g the temperature and light within the water of a lake changes with depth but on the whole the dominating factors are the same e g the entire lake ecosystem is dominated by fresh water the primary producers are phytoplankton and macroalgae and so on Examples of different ecosystems include Forests Grasslands Wetlands Lakes Rivers Rocky shores Soft shores beaches Deserts But the distinction between an environment and an ecosystem is the fact that when you refer to an ecosystem you re talking about the habitat the organisms that live there AND how they interact and affect each other For example in a forest ecosystem the soil fertility influences

    Original URL path: http://www.biology-online.org/biology-forum/about40546.html (2016-02-17)
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  • Biology-Online • View topic - 1 small multiple choice question [population dynamics]
    Whaling Commission IWC is an international body set up by the terms of the international Convention for Regulation of Whaling ICRW which was signed in Washington D C United States on 2 December 1946 to provide for the proper conservation of whale stocks and thus make possible the orderly development of the whaling industry In 1982 the IWC adopted a moratorium ban on commercial whaling 1 1 once the ban on whaling had been instituted the populations of whales increased Which is the best description of the growth in whales A accelerating growth phase B decelerating growth phase C equilibrium phase D lag phase Please clarify the answer for this there is conflicting views Reply with quote BasicBiology BasicBiology Posts 26 Joined Wed Jul 30 2014 2 27 am Location New Zealand Website Wed Sep 24 2014 7 47 am Going off the information you ve given A The acceleration phase is the initial increase in population and is often followed by an exponential growth phase if conditions continue to be favourable similar to what the human population has been going through If a population is small enough the reproduction rate can be so low that there is a lag

    Original URL path: http://www.biology-online.org/biology-forum/about40829.html (2016-02-17)
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  • Biology-Online • View topic - The influence of area on the number of species
    were in the original area Reply with quote JackBean JackBean Posts 5694 Joined Mon Sep 14 2009 7 12 pm Sat Jun 08 2013 5 00 pm really So when going from x m2 with y species to 10x m2 with 2y it s different than when going from 10x m2 to x m2 Reply with quote animartco animartco Posts 117 Joined Sat Jan 21 2012 12 56 pm Re Tue Nov 19 2013 1 16 pm JackBean wrote really So when going from x m2 with y species to 10x m2 with 2y it s different than when going from 10x m2 to x m2 I don t do maths but using logic instead it seems that if you only get double the number by muliplying by ten when dividing by ten you would get a catastrophic drop Reply with quote ughaibu ughaibu Posts 35 Joined Sun Dec 10 2006 7 44 am Re Re Wed Nov 20 2013 5 56 am animartco wrote I don t do maths but using logic instead it seems that if you only get double the number by muliplying by ten when dividing by ten you would get a catastrophic drop If you have an area of ten with two species then an area of one hundred has four species How many species if you divide one hundred by ten Reply with quote animartco animartco Posts 117 Joined Sat Jan 21 2012 12 56 pm Tue May 27 2014 1 19 pm The point is that if you have two species and you multiply the area by ten you should using basic maths get 20 species But you only get four So the actual equation that applies is one that is far more complicated than simple mathematics Reply with quote BasicBiology BasicBiology Posts

    Original URL path: http://www.biology-online.org/biology-forum/about27685.html (2016-02-17)
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