It is the process of assisting the recovery of an ecosystem that has been degraded, damaged, or destroyed or deteriorated (society for Ecological restoration definition). ..................the assignment of this was approved by mohamud abadir( specialist of ecological science and Biodiversity), who is lecturer in jigjiga university, east ethiopia.

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Assignment of environmental degradation and restoration ecology
Jigjig a university
College of dry land Agriculture.
Program/depart: Range ecology and Biodiversity
Course: environmental degradation and restoration ecology
Assignment Title: restoration ecology.
Type of assignment: individual
Student name: Mowlid Hassan Abdilahi
IDNo: 1270/08
Instructor: mohamud Abadir (specialist of ecological science and
Biodiversity)
4/3/2018

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Assignment of environmental degradation and restoration ecology
Assignment contents
Pages
1.0. Definition and concept of restoration ecology________________________________3
1.1. Restoring Ecological Function_____________________________________________4
1.2. Restoration ecology for soil degradation____________________________________ 4
1.2.1Soil Fertility Management to Restore Soil Quality____________________________ 5
1.2.2 Improving Soil/Agro-Biodiversity__________________________________________6
2. Rangeland restoration and management______________________________________6
2.1. Role of vegetation in restoration of degraded rangelands________________________7
2.2. RANGELAND RESTORATION TECHNIQUES____________________________________7
3. Restoration Ecology and Evolutionary Process__________________________________8
3.1 Restoration Ecology for climate change_______________________________________8
4. Reference and citations of the assignment _____________________________________8
Key words and terminologies of the assignment:
Reclamation, remediation; on site mitigation(partial return to original); evolutionary;
ecological; soil resilience ; Restoration; rehabilitation; cleanup, removal.

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Assignment of environmental degradation and restoration ecology
1. Introduction of Ecosystem and concept of restoration ecology
It is the process of assisting the recovery of an ecosystem that has been degraded, damaged, or
destroyed or deteriorated (society for Ecological restoration definition). Also we can define
Restoration ecology is a complex conservation activity that creates plant and animal
communities/ecosystems modeled on historical systems and ecological theory, on sites thahave
been significantly altered by modern human disturbance.
Figure 1. Concept of restoration ecology to other efforts to improve degraded lands or destroyed
ecosystem. This figure illustrating that there are a number of efforts that may be employed to
help improve injured ecosystems. Terms like restoration, rehabilitation, remediation, and
reclamation are often used interchangeably in practice, but their definitions vary by authorizing
laws and implementing agencies. Now The degraded ecosystem exhibits a lower level of
structure and function, compared to the original ecosystem. The degraded ecosystem can be
returned to its original state using removal, cleanup, remediation and other restoration
activities. Along the black arrow pointing toward “Reclamation,” the shows reclamation
activities improving the structure and function of the ecosystem. Restoration activities (shown
as occurring along the dotted arrow) further improve the Ecosystem structure and return the
ecosystem to its original state. Off-site mitigation can be used alone or in combination with
other approaches to return ecosystems (perhaps in a different location) to their original state.
Anyway ecological restoration is defined as an intentional activity that initiates or accelerates
the recovery of a degraded, damaged, or destroyed ecosystem with respect to its health.
Source: Adapted from Bradshaw (1987).

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Assignment of environmental degradation and restoration ecology
1.1 Restoring Ecological Function
The desire to restore species and communities stems both from their intrinsic ecological Value
as well as the provision of critical ecosystem services. However, a focus on ecological processes
in a restoration context provides a different view of the State and dynamics of ecosystems and
the services they may provide. In pragmatic terms,
Measuring ecological functioning requires appraisal of key ecological processes, such as
 Nutrient processing,
 Productivity or decomposition.
The currency is typically a process rate, and it reflects system performance. Because ecosystem
function may indicate important elements of system performance, environmental managers
are also increasingly interested in the use of functional assessments.
Historically, many ecological restoration efforts have focused on single species, populations, or
the Composition of ecological communities. However, it is recognized increasingly that
restoration of ecological processes, such as nutrient turnover or hydrological flux, may be
critical components of restoration outcomes. This understanding has been paralleled by an
upsurge in ecological research on the linkage between ecological structure (e.g., species
diversity, habitat complexity) and ecological function (e.g., biogeochemical processes,
disturbance regimes). Linking theoretical models of ecosystem and community change with
restoration ecology has the potential to advance both the practice of restoration and our
understanding of the dynamics of degraded environment. Ideally, ecological restoration efforts
create physical and ecological conditions that promote self-sustainable, resilient systems with
the capacity for recovery from rapid change and stress (Holling 1973; Walker et al. 2002).
1.2. Restoring of soil degradtion
Soil; the most basic of all resources, the mother of every productivity, it is the essence of all
terrestrial life and a cultural heritage. Yet, soil is finite in extent, prone to degradation by
natural and anthropogenic factors. Any way in order to restore the soil it must be focused on
the Physical restoration, Chemical restoration, Biological restoration and Ecological
restoration.
1.Physical restoration: by
 Reducing desertification,
 improving aggregation,
 improving plant available water capacity, improving aeration.
2. Chemical restoration: by
 By alleviating acidification,
 decreasing Salinization,
 creating elemental favorable balance,
 improving activity and capacity of nutrient pools,

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Assignment of environmental degradation and restoration ecology
3.Biological restoration . by
 Increasing microbial biomas carbon
 Enhancing soil Biodiversity
 Creating disease suppressive soils
 Increasing mycohorhizal and Rhizobial population.
4.Ecological restoration of soil by
 Increasing soil C pool
 Strengening elemental cyclin
 Creating favorable hydrological balance
 Enhancing ecoystem service
1.2.1. Soil Fertility Management to Restore Soil Quality
Sustainable intensification (SI), producing more from less by reducing losses and increasing the
use efficiency, is attainable only through improvement of soil quality including chemical quality
or soil fertility. Although not the only way to increase soil fertility, the use of INM is a very
effective approach for achieving SI. Nutrient depletion and loss of soil fertility are major causes
of low productivity [49] in many developing countries. Use of organic amendments, by recycling
organic by-products including urban waste, is a useful strategy to enhance soil fertility and
improve structural stability or aggregates . While, nitrogen (N) input is important to improving
soil fertility, its improper and/or excessive use can also lead to environmental pollution. China
consumes about 30% of the world’s N fertilizer [52], and is able to feed ~22% of the world
population on just 6.8% of the global cropland area. However, the country has severe
environmental problems because of low N use efficiency, leaching of reactive N into surface
and groundwater resources, and emission of N (as N2O) into the atmosphere. Soil organic
matter has been identified as an indicator of soil fertility based on the rationale that it
contributes significantly to soil physical, chemical, and biological properties that affect vital
ecosystem processes of rangelands, Soil aggregate stability is widely recognized as a key
indicator of soil and rangeland health. It is related to a number of ecosystem properties,
processes, and functions, including the quantity and composition of organic matter, soil biotic
activity, infiltration capacity, and resistance to erosion. Soil aggregation has potential benefits
on soil moisture status, nutrient dynamics, slope maintenance, and erosion reduction.
1.2.2 Improving Soil/Agro-Biodiversity
Soil biota are important to soil restoration and reduce risks of degradation and desertification.
Indeed, soil biota comprise a major component of global terrestrial biodiversity and perform
critical roles in key ecosystem functions (e.g., biomass decomposition, nutrient cycling,
moderating CO2 in the atmosphere, creating disease suppressive soils, etc.). Improving activity
and species diversity of soil fauna and flora (micro, meso and macro) is therefore essential to
restoring and improving soil quality and reducing risks of soil degradation. Adverse effects of
agricultural management on soil microbiological quality is another global concern. As a

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Assignment of environmental degradation and restoration ecology
management tool, either a microbiological quality index or a microbiological degradation index
can be useful for decision-making processes Relevant parameters include MBC, respiration,
water soluble carbohydrates, enzymatic activities, dehydrogenase activity and activities of
other important hydrolases (e.g., urease, protease, phosphatas and P-glucosidase) . There are
also marked seasonal changes in biotic and abiotic factors that affect the biological component
of soil resources. Vegetative cover, influenced by seasonal changes, has a strong impact on soil
microbiological processes.
2. Rangeland restoration and management
Natural ecosystems have been severely destroyed because of anthropogenic disturbances,
unreasonable utilization, and neglect of protection and restoration. These disturbed or
degraded ecosystems are confronted with poor soil fertility, shortage of water and deteriorated
microenvironment, which would severely restrict their productivity. How to comprehensively
restore and harness the degraded ecosystem is a key issue in increasing productivity, improving
environmental conditions and achieving sustainable development. When the disturbance is
removed, the degraded ecosystems will initiate a succession to the primitive community, and
restoration process is considered as the progressive succession. Management of rangeland
degradation can be divided into preventative and restoration measures. Answers to
preventative measures can often be found within the causes of land degradation. In view of the
massive scale of land degradation. where restoration is of significant importance to land
owners. The fast rate at which intact natural ecosystems are degraded and decline, has
emphasized the importance of ecological restoration to maintain the earth’s natural capital .
In order to restore degraded ecosystems, it is crucial to identify which ecosystem functions
should be restored first. It is therefore, important to define the functional status of the
ecosystem beforehand. It is also important to establish the relationship between ecosystem
structure and functioning, and to assess the potential for ecosystem restoration.
2.1. The role of vegetation in restoration of degraded rangelands
Vegetation plays an important role in erosion control; it efficiently mitigates erosion by active
and passive protection. Active protection against erosive agents consists of raindrop
interception (Woo et al., 1997), and increase in water infiltration in soil, thermal regulation and
soil fixation by root systems. Vegetation also has a passive action by trapping and retaining
sediments inside the catchment due to its aerial parts. A protective soil cover can be installed
efficiently on eroded lands using bioengineering works based on common practices of
ecological engineering. These structures favor artificial and natural vegetation dynamics so the
vegetation predominates over erosive dynamics and controls it. The long-term goal of the
degradation interventions is to restore ecosystems, in accordance with recent considerations
about ecological engineering concepts and techniques Restoration is commonly considered as
accelerated succession. Planting vegetation as a restoration measure for degraded rangelands

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Assignment of environmental degradation and restoration ecology
is preferred over structural measures since concrete, stonework, wood or any other building
materials are subject to decay and liable to be avoided Vegetation grows through different
stages while it is improving the function of the ecosystem by providing physical soil protection
against erosion by reducing the velocity of runoff and its decomposition contributes to nutrient
cycling.
2.2. RANGELAND RESTORATION TECHNIQUES
In rangelands that have become degraded to the point that ecosystem functions cannot
recover solely through-improved management strategies within practice-relevant time spans,
active rehabilitation techniques are sought Most of these techniques aim at the improvement
of soil water status by increasing infiltration or decreasing evaporative loss. These restoration
techniques include introducing transplants, application of brush packs or organic mulch and
developing micro catchments to capture runoff . Revegetation and improvement of degraded
land should be practiced after development of better techniques of seedbed preparation and
planting methods . Seed germination and establishment of natural and artificial revegetation is
a result of the number of seeds favorable in microsites or „safe sites‟ in the seedbed rather
than the total number of available seeds . Various techniques to improve microsites for sown
seeds and to increase the seed germination rate and establishment have been introduced in
the rangeland revegetation process .Some methods used for rangeland restoration consist of
biological and mechanical approaches. The biological approach includes planting methods of
seeds using manure, gravel, and grass. The mechanical approach includes use of farm
implements to disturb the soil.
3. Restoration Ecology and Evolutionary Process
Restoration activities have increased dramatically in recent years, creating evolutionary
challenges and opportunities. Though restoration has favored a strong focus on the role of
habitat, concerns surrounding the evolutionary ecology of populations are increasing.
previous researchers have considered the importance of preserving extant diversity and
maintaining future evolutionary potential, but they have usually ignored the prospect of
ongoing evolution in real time. However, such contemporary evolution (changes occurring over
one to a few hundred generations) appears to be relatively common in nature . Moreover, it is
often associated with situations that may prevail in restoration projects, namely the presence
of introduced populations and other anthropogenic disturbances Any restoration program may
thus entail consideration of evolution in the past, present,and future. Restoration efforts
often involve dramatic and rapid shifts in habitat that may even lead to different ecological
states (such as altered fire regimes) Genetic variants that evolved within historically different
evolutionary contexts (the past) may thus be pitted against novel and mismatched current
conditions (the present). The degree of this mismatch should then determine the pattern and
strength of selection acting on trait variation in such populations. If trait variation is heritable

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Assignment of environmental degradation and restoration ecology
and selection is sufficiently Strong, contemporary evolution is likely to occur and may have
dramatic impacts on the adaptive dynamics of restoration scenarios. Adaptation to current
conditions (the present) may in turn influence the ability of such populations to subsequently
persist and evolve over short or long periods (the future). Thus, the success (or failure) of a
restoration effort may oftenbe as much an evolutionary issue as an ecological one. It is also
useful to recognize that contemporary evolution may alter the interactions of species with their
environments and each other. Restoration ecologists may thus be faced with a changed cast of
players, even if many of the same nominal species are restored.
3.1. Restoration Ecology for climate change
Also I want to write the linkages between two fields that have been little acquainted yet
have much to say to one another: restoration ecology and climatology. The limited discourse
between these fields is surprising. In the last two decades there have been significant
theoretical breakthroughs and a proliferation of research on historical climate and climate-
related sciences that have led to an overhaul of our understanding of Earth’s
climatesystemThese new insights are relevant to restoration and ecology—so much so that
fuller understanding could trigger rethinking of fundamental principles.
Conceptual views of the natural world influence tactical approaches to conservation,
restoration, and resource management. to understand and assimilate into restoration ecology
theory—that is, the role of the natural climate system as a pervasive force of ecological change.
Advances in environmental sciences The phrase climate change usually connotes global
warming, greenhouse gas impacts, novel anthropogenic threats, and international politics.
There is, however, a larger context that we must begin during the mid-to-late twentieth century
on ecological succession, disturbance, and spatial and temporal variability motivated a shift
from viewing nature as static and typological to dynamic and process driven. In turn,
restoration ecology and practice matured from emphasis on museum-like nature preservation
to maintaining variability and natural function.
4. Reference and literature citations of the assignment
 Foundations of restoration ecology book of SERI. Edited b Donald A. Falk,
Margaret A. Palmer, and Joy B. Zedler
Foreword by Richard J. Hobbs
 Article, Restoration Soil Quality to Mitigate Soil Degradation
 Rattan Lal The Ohio State University, Columbus, OH 43210, USA; E-Mail: lal.1@osu.edu.
 Article, Evolutionary Restoration Ecology Craig A. Stockwell, Michael T. Kinnison, and Andrew P.
Hendry
 Williamson, James M., Hale W. Thurston, and Matthew T. Heberling. 2008. Valuing Acid
Mine Drainage Remediation in West Virginia: A Hedonic Modeling Approach. The Annals
of Regional Science, 42(4): 987-999.
 THE 10th EUROPEAN CONFERENCE ON ECOLOGICAL RESTORATION
E