1. Each animal has its ecological niche.

2. Fewer plants equate to fewer ecological niches and fewer species of animals to fill them.

3. Old ecological niches were destroyed in the process and new ones opened up.

4. Living space - more formally known as the "ecological niche concept" by biologists - refers to the particular requirements of an organism to thrive.

5. Based on the literature review of the ecological niche theory and the urban tourism competitiveness, the concept of tourism competitiveness niche is discussed.

5. try its best to collect and make good sentences.

6. This environment emphasizes the learning process and ecological niche differentiation in learners' professional development, thus enhancing autonomy in professional development.

7. Human beings fill every ecological niche on the planet, from the icy tundra to the tropical rain forests to the deserts.

8. The ecological niche of an organism is the position it fills in its environment comprising the conditions under which it is found, the resources it utilizes and the time it occurs there.

9. To study ecological niche of the Acaroid mites breeding in grain stocks with the logical and qualitative research.

10. It seems they grew to fill an ecological niche left by the dinosaurs, aided by a global environment that supported large body sizes.

11. The integrated ecological niche of complex ecosystem included 4 sub-niches of natural resources, environment, economy and society, and these sub-niches comprised many single-item indicators.

12. By contrast, the appeal of the industrial co-operative remains unchallengeable, its ecological niche exclusive to it.

13. It is an organism that has taken advantage of a man-made ecological niche, created in buildings' water systems.

14. This in turn has led to rapid evolution to fill the vacant or new ecological niches.

15. Some thing or things have to happen for a microbe to escape its previously harmless ecological niche and reach critical mass.

16. It would mean plesiosaurs not only occupied a similar ecological niche to whales, but behaved like them, too.

17. Erectus was on our side of a great divide—with an expanded cranium and an ecological niche defined by the use of tools.

18. Like any wily and surviving creature, this new ideology has faced evolutionary pressures and adapted to its ecological niche.

19. The planet was dominated by a family of vaguely crocodile-like animals called crurotarsans that filled every major ecological niche, from slow-munching herbivores to fleet predators.

20. Most plants and animals have evolved to live in a fairly narrow ecological niche.

21. The behemoths, known as Bonnerichthys gladius and Rhinconichthys taylori, grew to 30 to 50 feet long and occupied the ecological niche now filled by whales and whale sharks.

22. Even animals many of us find "ugly" are only demonstrating the perfect body shape for their particular ecological niche.

23. Historians have remarked that here Darwin anticipated the modern concept of an ecological niche.

24. The second part discusses about "principle of competition exclusion" of the enterprises and enterprises' ecological niche differentiation.

25. "Life on Earth has radiated into every conceivable - and in some cases almost inconceivable - ecological niche," says Chris Impey of the University of Arizona in Tucson, US.

1. Each animal has its ecological niche.