How many bird extinctions have we prevented?
... birds for the IUCN Red List using the explicitly quantitative Mace-Lande extinction risk criteria, and gave sufficient information to make comparisons with the status of these species as assessed in BirdLife International (2004a). We then examined each of the 27 candidate species in greater detail t ...
... birds for the IUCN Red List using the explicitly quantitative Mace-Lande extinction risk criteria, and gave sufficient information to make comparisons with the status of these species as assessed in BirdLife International (2004a). We then examined each of the 27 candidate species in greater detail t ...
The Global Invasive Species Programme
... commercial routes and the ornamental, fishing, agriculture and forestry trades, among many others. The ways or materials through which species are transported are defined as vectors. For example, ballast water is the vector for the establishment of the golden mussel, Limnoperma fortunei in Argentina ...
... commercial routes and the ornamental, fishing, agriculture and forestry trades, among many others. The ways or materials through which species are transported are defined as vectors. For example, ballast water is the vector for the establishment of the golden mussel, Limnoperma fortunei in Argentina ...
AAAI Proceedings Template - San Francisco State University
... and habitat degradation due to human activity are chief among these challenges (Millennium Ecosystem Assessment 2005). Some immediate and dramatic results of such perturbations are the loss of species native to ecosystems (Hughes, Daily and Ehrlich 1997), the invasion of ecosystems by species alien ...
... and habitat degradation due to human activity are chief among these challenges (Millennium Ecosystem Assessment 2005). Some immediate and dramatic results of such perturbations are the loss of species native to ecosystems (Hughes, Daily and Ehrlich 1997), the invasion of ecosystems by species alien ...
The Wired Atlas of the Human Ecosystem | Wired Magazine | Wired
... under one of his handmade microscopes. “I found, to my great surprise,” he wrote, “that it contained many small animalcules, the motions of which were very pleasing to behold.” With the advent of fast DNA sequencing, today’s microbiologists can delve deep into this weird inner universe, and they’re ...
... under one of his handmade microscopes. “I found, to my great surprise,” he wrote, “that it contained many small animalcules, the motions of which were very pleasing to behold.” With the advent of fast DNA sequencing, today’s microbiologists can delve deep into this weird inner universe, and they’re ...
The origins of turfgrass species
... to as a "native" grass. Until humans began moving among the continents, oceans limited the range of grasses to their regions of origin. But as farmers, herdsmen, gardeners and other people began crossing the seas, they often brought grass seeds with them. Often, those "introduced" grasses would beco ...
... to as a "native" grass. Until humans began moving among the continents, oceans limited the range of grasses to their regions of origin. But as farmers, herdsmen, gardeners and other people began crossing the seas, they often brought grass seeds with them. Often, those "introduced" grasses would beco ...
here - Upper Sugar River Watershed Association
... about 5 square miles and has a steep gradient of approximately 42 feet per mile. The high gradient of the creek coupled with its steep hillside slopes causes this stream to be very flashy during major precipitation events. Brook trout are prolific in this water body, and redside dace (a rare species ...
... about 5 square miles and has a steep gradient of approximately 42 feet per mile. The high gradient of the creek coupled with its steep hillside slopes causes this stream to be very flashy during major precipitation events. Brook trout are prolific in this water body, and redside dace (a rare species ...
Lesson 3 - Kingsborough Community College
... original two species. What is the "2N" chromosome number of the sterile hybrids that form between the original two species S. maritima and S. alterniflora? a. 31 b. 60 c. 61 d. 122 e. 153 16. What is the 2N chromosome number of the new species S. anglica? a. 60 b. 61 c. 62 d. 122 e. 153 17. A horse ...
... original two species. What is the "2N" chromosome number of the sterile hybrids that form between the original two species S. maritima and S. alterniflora? a. 31 b. 60 c. 61 d. 122 e. 153 16. What is the 2N chromosome number of the new species S. anglica? a. 60 b. 61 c. 62 d. 122 e. 153 17. A horse ...
A newly identified population of Gambusia affinis (Baird and Girard
... The ecological impacts of the introduction of G. affinis will directly affect the ability of the ecosystem to provide the goods and services needed, or desired, by humans. Ecotourism is an important factor contributing to the socioeconomy in the region (Yusof et al. 2011). As the value of an ecotour ...
... The ecological impacts of the introduction of G. affinis will directly affect the ability of the ecosystem to provide the goods and services needed, or desired, by humans. Ecotourism is an important factor contributing to the socioeconomy in the region (Yusof et al. 2011). As the value of an ecotour ...
Community assembly and invasion: An experimental Joseph Fargione* , Cynthia S. Brown
... functional guilds had its strongest negative effect on the cover attained by introduced species of the same functional guild in a partial correlation coefficients analysis (Table 2). In another test of the same hypothesis, we found that introduced and resident proportional cover were negatively rank ...
... functional guilds had its strongest negative effect on the cover attained by introduced species of the same functional guild in a partial correlation coefficients analysis (Table 2). In another test of the same hypothesis, we found that introduced and resident proportional cover were negatively rank ...
FOOD HABITS AND RESOURCE PARTITIONING ... (HERPESTIDAE, VIVERRIDAE) IN THE RAINFORESTS ...
... severa] prey items are nocturnal (e.g. the colubrid snake Crotaphopeltis hotam boeia) is a further demonstration of the nocturnal habits of this mongoose (Estes, 1 99 1 ). However, it should be noted that the activity rhythm of this species tends to vary geographically: for instance, it is nocturn ...
... severa] prey items are nocturnal (e.g. the colubrid snake Crotaphopeltis hotam boeia) is a further demonstration of the nocturnal habits of this mongoose (Estes, 1 99 1 ). However, it should be noted that the activity rhythm of this species tends to vary geographically: for instance, it is nocturn ...
On the stabilizing effect of predators and competitors on ecological
... upon a bistable community, thus complementing Kirlingers (1986) work on two-prey, two-predator systems. We shall also investigate the effect of a predator (or a competitor) upon an ecological community consisting of three cyclically competing species which was originally studied by May and Leonard ( ...
... upon a bistable community, thus complementing Kirlingers (1986) work on two-prey, two-predator systems. We shall also investigate the effect of a predator (or a competitor) upon an ecological community consisting of three cyclically competing species which was originally studied by May and Leonard ( ...
Hybrid
... biochemistry, and DNA sequences when grouping organisms • The biological species concept states that a species is a group of populations whose members have the potential to interbreed in nature and produce viable, fertile offspring; they do not breed successfully with other populations • Gene flow b ...
... biochemistry, and DNA sequences when grouping organisms • The biological species concept states that a species is a group of populations whose members have the potential to interbreed in nature and produce viable, fertile offspring; they do not breed successfully with other populations • Gene flow b ...
ecosystems - NanmoScience10
... Definition/Concept a region that has ________ components (oxygen, water, nutrients, light and soil) that interact with ________ components (plants, animals, and micro-organisms). They are contained within ________ ...
... Definition/Concept a region that has ________ components (oxygen, water, nutrients, light and soil) that interact with ________ components (plants, animals, and micro-organisms). They are contained within ________ ...
BIL 161 Research Project: Biodiversity in Local Ecosystems and
... II. Assignment: Literature Search and Review An essential part of undertaking a research project is to find out what is already known about your area of interest, why it is important, relevant. Previous research might give you ideas about what questions still need to be addressed in this area. For e ...
... II. Assignment: Literature Search and Review An essential part of undertaking a research project is to find out what is already known about your area of interest, why it is important, relevant. Previous research might give you ideas about what questions still need to be addressed in this area. For e ...
Lesson 8
... Interesting patterns can occur depending on the relationship of the isoclines to each other: • When the isoclines cross with K1 exceeding K2/. , each species limits the other more than it does itself), population trajectories are such that stable equilibrium points exist at both species carrying ca ...
... Interesting patterns can occur depending on the relationship of the isoclines to each other: • When the isoclines cross with K1 exceeding K2/. , each species limits the other more than it does itself), population trajectories are such that stable equilibrium points exist at both species carrying ca ...
Lethal Interactions Between Parasites and Prey Increase Niche
... parasitoid species (18) (figs. S1 to S7). Most parasitoids were braconid wasps in the subfamily Opiinae (17 species): 14 Bellopius species (n = 199 individuals), two Thiemanastrepha species (n = 50), and one Utetes species (n = 2). We also reared a figitid wasp species (n = 62) (18). The level of pa ...
... parasitoid species (18) (figs. S1 to S7). Most parasitoids were braconid wasps in the subfamily Opiinae (17 species): 14 Bellopius species (n = 199 individuals), two Thiemanastrepha species (n = 50), and one Utetes species (n = 2). We also reared a figitid wasp species (n = 62) (18). The level of pa ...
Invasive species: a threat to our heritage
... negatively on their local ecosystems. These species are introduced primarily by humans; sometimes accidentally, while at other times very much intentionally. Globalisation, which admittedly holds many benefits for human society, has in the last few hundred years encouraged an unprecedented movement ...
... negatively on their local ecosystems. These species are introduced primarily by humans; sometimes accidentally, while at other times very much intentionally. Globalisation, which admittedly holds many benefits for human society, has in the last few hundred years encouraged an unprecedented movement ...
Ecology
... Prehistoric extinctions (3000-200 years ago) occurred on many Pacific islands as a result of hunting and the introduction of rats, dogs, and pigs. ...
... Prehistoric extinctions (3000-200 years ago) occurred on many Pacific islands as a result of hunting and the introduction of rats, dogs, and pigs. ...
KIMBERLEY MAMMALS - Kimberley Society
... only as subfossils (that is likely to have been alive at or shortly before European settlement). A further four species that have disappeared from the Kimberley still occur elsewhere in Australia. An enigmatic species is the Daada, known to older Aboriginal people but never recorded by scientists. I ...
... only as subfossils (that is likely to have been alive at or shortly before European settlement). A further four species that have disappeared from the Kimberley still occur elsewhere in Australia. An enigmatic species is the Daada, known to older Aboriginal people but never recorded by scientists. I ...
Patterns of Geographical Distribution: Animals
... percentage of endemic species. Island faunas are also thought to be unsaturated, although this is a matter of some debate. In addition there are a number of evolutionary trends in which island species tend to have noticeably larger or smaller body sizes than do their continental counterparts. For gr ...
... percentage of endemic species. Island faunas are also thought to be unsaturated, although this is a matter of some debate. In addition there are a number of evolutionary trends in which island species tend to have noticeably larger or smaller body sizes than do their continental counterparts. For gr ...
Chp 53 Community Ecology
... Heliconius eggs; an adaptation that may divert egg-laying butterflies to other plants. ´ These nectaries, as well as smaller ones, also attract ants and wasps which prey on butterfly eggs'and larvae. ´ Thus, what appears to be coevolution may actually result from interactions with many species (not ...
... Heliconius eggs; an adaptation that may divert egg-laying butterflies to other plants. ´ These nectaries, as well as smaller ones, also attract ants and wasps which prey on butterfly eggs'and larvae. ´ Thus, what appears to be coevolution may actually result from interactions with many species (not ...
Poleward shifts in geographical ranges of butterfly species
... shifted their entire distribution northwards, more or less without altering the range size. For example, Heodes tityrus has completely disappeared from the Montseny region of Catalonia, where it was easily seen early this century. At the northern limit of the same species, there were only three isol ...
... shifted their entire distribution northwards, more or less without altering the range size. For example, Heodes tityrus has completely disappeared from the Montseny region of Catalonia, where it was easily seen early this century. At the northern limit of the same species, there were only three isol ...
Chapter 13
... that they need is in short supply. For example, the thrushes that we discussed earlier may compete for food if there is not enough for all of them, or for nesting sites. This is an example of intraspecific competition. ‘Intra’ means ‘within’, so intraspecific competition occurs between members of th ...
... that they need is in short supply. For example, the thrushes that we discussed earlier may compete for food if there is not enough for all of them, or for nesting sites. This is an example of intraspecific competition. ‘Intra’ means ‘within’, so intraspecific competition occurs between members of th ...
Scale and species numbers
... number of species on Earth? At this scale, the immigration rate is zero (although some cosmologists and the Men in Black would disagree), local loss of species does not apply, and the total species count is determined by the history of speciation and extinction events. It is possible that species nu ...
... number of species on Earth? At this scale, the immigration rate is zero (although some cosmologists and the Men in Black would disagree), local loss of species does not apply, and the total species count is determined by the history of speciation and extinction events. It is possible that species nu ...
Godfrey SCJ, Lawton JH, 2001. Scale and species
... number of species on Earth? At this scale, the immigration rate is zero (although some cosmologists and the Men in Black would disagree), local loss of species does not apply, and the total species count is determined by the history of speciation and extinction events. It is possible that species nu ...
... number of species on Earth? At this scale, the immigration rate is zero (although some cosmologists and the Men in Black would disagree), local loss of species does not apply, and the total species count is determined by the history of speciation and extinction events. It is possible that species nu ...
Introduced species
An introduced, alien, exotic, non-indigenous, or non-native species, or simply an introduction, is a species living outside its native distributional range, which has arrived there by human activity, either deliberate or accidental. Non-native species can have various effects on the local ecosystem. Introduced species that become established and spread beyond the place of introduction are called invasive species. Some have a negative effect on a local ecosystem. Some introduced species may have no negative effect or only minor impact. Some species have been introduced intentionally to combat pests. They are called biocontrols and may be regarded as beneficial as an alternative to pesticides in agriculture for example. In some instances the potential for being beneficial or detrimental in the long run remains unknown. A list of some introduced species is given in a separate article.The effects of introduced species on natural environments have gained much scrutiny from scientists, governments, farmers and others.