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I. You will hear a text about the development of ecological systems. Before listening discuss the words in the box with your fellow students and your teacher

sterile area

barren rock

lava flow

disrupted ecosystem

climax ecosystem

fertilization

inbreeding of crops

arable lands

fossil fuels

recycling techniques

interference in the development of ecosystems

deliberate maintenance of an immature ecosystem

Sound management of ecosystems

hinder efficient energy use

heightened susceptibility to plant diseases

optimal long-term production of pasturage

a moderate grazing schedule

renewal of the moisture and nutrient content of the soil

accumulated insecticides

II. Listen again. Choose the right option to complete the following sentences. In some cases more than one option is possible

  1. Ecological succession takes place when…

  1. humans start exploiting an existing ecological system;

  2. an unpopulated territory is colonized by living organisms;

  3. a destroyed ecosystem starts to develop anew.

  1. The growth phase of an ecosystem’s development is characterized by…

  1. high stability and high productivity;

  2. low stability and high productivity;

  3. low productivity and high stability.

  1. A great diversity of species and complex food webs are characteristic of …

  1. an ecosystem of an early stage;

  2. a mature ecosystem;

  3. a climax phase of an ecosystem’s development.

  1. To obtain an optimal result from agricultural use of an ecosystem we should…

    1. maintain the latter in the immature phase;

    2. combine the features of both early and mature ecosystems;

    3. intensify production by applying fertilizers.

  1. By adding energy to the ecosystem in the short run we

      1. increase the crops’ resistance to plant diseases;

      2. can make its exploitation more efficient;

      3. risk to destroy it in the long run by accumulating pollutants.

  1. The idea of the mutual dependence between the society and the nature…

  1. was first developed in the late 19th century;

  2. was expressed in the works of ancient philosophers;

  3. was rejected by religion.

  1. Nowadays systems ecology plays the key role in

  1. monitoring the effects of human agricultural and industrial activities on the environment;

  2. intensifying agricultural production;

  3. providing the sound management of natural resources.

  1. The development of recycling techniques …

  1. is systems ecology’s main concern;

  2. will play an important role in the economy of the future;

  3. may help decrease the negative impact of human activities on the nature.

III. Listen to the following fragment of the text again and reconstruct it

Although an awareness of the ________________ between human society and its environment was already prominent in ________________ and ________________, the formulation of the basic principles of systems ecology as a ________________ began in the late 19th century. During the ________________, the study of ecosystems has become increasingly sophisticated and is now ________________ in the assessment and control of the effects of ________________ and industrialization on the environment. ________________, for instance, it has shown that optimal long-term production of pasturage requires a moderate grazing schedule in order to ensure a steady renewal of the ________________of the soil and has emphasized the need for ________________ in the cultivation of ________________. Systems ecology has been concerned with the ________________ of accumulated insecticides and has provided a way of monitoring the ________________ of ________________ and carbon dioxide released by the ________________ (e.g., coal, oil, and natural gas). It has helped to determine regional ________________ and has furthered the development of recycling techniques that may become essential in ________________ with the environment.

WRITING

Make a written translation of the following sentences into English.

  1. Екосистема – це сукупність живих організмів та їх фізичного середовища, які взаємодіють між собою.

  2. Окремі складові екосистеми розподіляються на дві різні групи: абіотичні фактори, такі як мінерали, клімат, ґрунти, вода, сонячне світло та інші неживі елементи, та біотичні складові, що включають усі живі елементи екосистеми.

  3. Складові елементи екосистеми пов’язані між собою двома головними силами: потоками енергії та кругообігом речовин всередині системи.

  4. Автотрофи використовують зовнішню енергію, яку фіксують у простих вуглеводах для продукування більш складних органічних сполук, таких як білки, ліпіди, крохмаль, тощо, які здатні підтримувати процеси життєдіяльності в організмі.

  5. Гетеротрофи є консументами у екосистемі; вони використовують, переробляють і, врешті решт, розкладають складні органічні речовини, накопичені автотрофами.

  6. Автотрофи разом з гетеротрофами формують різні трофічні рівні в екосистемі: рівень продуцентів, утворений організмами, які самостійно продукують органічні речовини; первинний рівень консументів – організмів, які живляться продуцентами; вторинний рівень консументів, які живляться первинними консументами і так далі.

  7. Останню ланку у ланцюгу живлення складають редуценти – гетеротрофи, які розкладають мертві організми та органічні відходи.

Unit 5 Focus Words and Phrases

accumulate, v (2)

affect, v (2)

affinity, n (2)

approximate, v (1)

argue, v (2)

beneficial, adj (2)

bias, n (2)

budding, n (3)

coin, v (4)

community, v (4)

composition, n (4)

concomitantly, adv. (1)

consumer, n (4)

convolution, n (1)

crossbreeding, n (3)

cultivate, v (3)

curve, n (1)

decline, n (4)

decomposer, n (4)

descent, n (2)

determine, v (3)

discern, v (1)

discover, v (3)

disease, n (4)

disintegrate, v (2)

distribution, n (4)

diverge, v (2)

dominant, adj (3)

efficient, adj (1)

emerge, v (1)

emphasize, v (4)

encroaching, adj (4)

entail, v (2)

estimate, n (2)

extant, adj (1)

extinct, adj (1)

favourable, adj (2)

grafting, n (3)

grip, n (1)

heterogeneity, n (2)

immense, adj (1)

impetus, n (4)

implication, n (1)

inclination, n (1)

infer, v (2)

infinite, adj (2)

inheritance, n (3)

lineage, n (2)

maintain, v (4)

maturity, n (4)

mold, n (3)

mutation, n (3)

niche, n (4)

onset, n (1)

overlap, v (3)

pollution, n (4)

population, n (4)

postpone, v (4)

postulate, v (2)

posture, n (1)

precision, n (1)

predator, n (2)

preservation, n (2)

propinquity, n (2)

propulsive, adj (1)

relax, v (1)

remarkable, adj (1)

reveal, v (2)

rotation, n (1)

scarcity, n (4)

spontaneous, adj (2)

spring, n (2)

starvation, n (4)

strife, n (4)

subordinate, adj (3)

supply, v (4)

thrive, v (2)

trait, n (3)

transmit, v (2)

treat, v (3)

trend, n (1)

trunk, n (1)

yeast, n (3)

(un)familiar to (4)

account for (2)

apply something (to something/to do something) (3)

as compared with (1)

be concerned with (1)

call attention to (4)

correspond closely with (1)

from (someone’s) point of view (4)

influence of something on something (4)

keep something in check (2)

provide information on something (3)

resistant to (3)

specialize in (something/doing something) (3)

susceptibility to a disease (1)

take account of (1)

the appearance of something (3)

with no regard for / without regard for (2)

Revision and Additional Practice 5