Expropriation species, disease causing points, and disease
causing agents affect the variety and variability of living organisms,
functioning of ecological community and resources, and human health. Change in
the weather, use of the land, and transfer vectors commerce in complicated
methods to control the increase of local and non-local expropriation species,
disease causing agents, and their out-turn on ecological change. Early
identification and in-deep comprehension of expropriation species and diseases which
cause infections will need an included system of investigate platforms and
knowledge interchange to diagnose hotspots of expropriation or disease appearance.
Association with state and federal agencies that observe the increase and
collision of expropriation species and disease causing agent  will be censorious in rising a national data
and investigate system that can make easy a full sympathetic of the resultant
effects on living oranisms and their system. resident science play a important  role; persons can report new expropriation,
record phonology changes related with expropriation or disease outcomes, and
can take a part in hard work such as the Breeding Bird Survey, which may disclose
change in the long term of biotic factors following species exporiation and
increase in the disease. The ecosystem and its society collision of expropriation
species and disease causing agents differ across leaning of weather and use of
land, and in the present condition of worldwide weather change may make worse
both their proliferation and collisions. Understanding the connections of
expropriation species, disease causing points, and disease causing agents  with other drivers of change in the ecosystem
is dangerous for ecosystem and also for human beings.

In a nutshell

•expropriation species and diseases which are responsible
for causing infection are becoming more prevailing and extensive with increased
the interation and economic process •the second most important reason is the
death of unfamiliar species  in the US
and cost approximately $120 billion annually •Disease line and disease causing
agents are increasing in the world wide due to the  human activites like transport, change in the
use of land, and change in the weather •To sufficiently understand and forecast
the increase of expropriation species and disease, we must organize the many accessible
networks at local, regional, continental, and global scales •Both observational
and experimental approaches are important  to fully understand the property and collisions
of expropriation species and diseases and, most important is to understand the
biotic and abiotic factors that improve or reduce their side effects

Intro

The increase in the human population in the worldwide  has enlarged the occurrence and outcome of
biological expropriation and spread of disease. The other important reason is
the outbreak of disease in the worldwide is 
new systems of trade among previously disconnected countries (Aide and
Grau 2004) and also improved transportation tools (eg airplanes and barges)
have increased both the occurrence and amount of expropriation. In addition,
human activities like use of land for different purposes and change in the
weather cooperate with human transportation systems to make easy the in the
increase of  expropriation species,
vectors, and disease causing agents from native to continental scales (Dukes
andMooney 1999; Sakai et al. 2001; Benning et al. 2002; Patz et al. 2004; Smith
et al.) 

Expropriation species play vital role in the change of  ecosystem at various ways and organization
level , through local death  of native
species (eg chestnut blight; Mack et al. 2000) and entire communities, shifts
in native species richness and abundance (Parker et al. 1999), and altered fire
regimes, water quality, and biogeochemical cycles (D’Antonio and Vitousek 1992;
Vitousek et al. 1996; Strayer et al. 1999; Bohlen et al. 2004).

Expropriation species and infectious disease can more
effectively monitor by the coordination of cyber-infrastructure , and also along
with improved data 

Biotic and environmental factors are interacting with the
foreign species and spreading of disease (Figure 1),large scale guidance is
very important for the observations and experiments.

Here is a examples of expropriation species with current or
potential continental-scale distributions serve to describe how each
expropriation  species are present in
different climate regions (as defined by NEON) and also describe their effects
and spread of disease in the native ecosystem . The expropriation of the zebra
mussel (Dreissenapolymorpha) into the Great Lakes and its subsequent spread to
major river systems of the Midwest has altered abiotic factors, such as water
transparency, nutrient cycling, and benthic habitat structure, as well as
biotic factors, such as food-web structure, the bioaccumulation of contaminants,
and the diversity of native freshwater mussels (Strayer et al. 1999)

There are many other fuctions and services of the ecosystem
which occur those species which are important in regional level. There are few
examples which are as given below. Expropriation of the N-fixing tree,
Myricafaya, into nutrient-poor soils in Hawai`i affects the trajectory of plant
community development and biogeochemical cycling (Vitousek et al. 1996).

Change in the climate and also change in the land due to the
spreading of regional expansions of native species can also cause change in the
ecosystem . For example, desertification of perennial grasslands by the
expansion of desert shrubs, such as mesquite (Prosopsisglandulosa) and
creosotebush(Larreatridentata), alters hydrologic and biogeochemical cycling,
decreases biodiversity and range productivity, and facilitates invasions by
non-native plant species (Peters et al. 2006).

Conclusion:

expropriation species and new diseases both cause  the same problem; the  new species in the ecosystem has ability to change
the structure and function of ecosystems and the ecosystem services in which
people depend. Furthermore, some new disease causing agents  can directly collision into the human health.
Thus, ecosystem and the human beings are affected by the addition of new
species (invasives or diseases) to an ecosystem .There  are many species which are  already present in the ecosystem  and has power to affect on  human well-being positively or negatively, and
we must remember  that the introduction
of new species in the ecosystem  may
result in novel biotic relations and change in existing ones in the current
ecosystem
 The first question is  what causes the changing in  between locations in the organization of, collision
of, and success of countermeasures against new species? The answer of this
question  will improve our knowledge and
give us ability to expect which locations will be vulnerable to expropriation
by a particular species, the effect on the ecosystem and people, and what the
most effective local countermeasures will be.

The Second question is how do new species’ propagules arrive
at a location? For this we requires knowledge at regional and global scales, so
we can easily predict or calculate how a particular new species becomes
available for expropriation, which thing controls rates of expropriation, and
how preventative measures can be developed

a system of locations needs to be distributed in the
worldwide in a pattern that allows us to judge not only current conditions, but
also how they may change in the future