Skip to content

Conservation Of Plants Essay Writer


Aguilar R, Ashworth L, Galetto L and Aizen MA (2006) Plant reproductive susceptibility to habitat fragmentation: review and synthesis through a meta‐analysis. Ecology Letters 9: 968–980.

ANON (2012) Plants Under Pressure – A Global Assessment. IUCN Sampled Red List Index for Plants. Royal Botanic Gardens, Kew, UK.‐conservation/search‐rescue/mapping‐plants/plants‐at‐risk/index.htm (assessed 13.03.2014).

Baeten L, Hermy M and Verheyen K (2009) Environmental limitation contributes to the differential colonization capacity of two forest herbs. Journal of Vegetation Science 20: 209–223.

Beissinger SR and Westphal MI (1998) On the use of demographic models of population viability in endangered species management. Journal of Wildlife Management 62: 821–841.

Bertin RI (2008) Plant phenology and distribution in relation to recent climate change. Journal of the Torrey Botanical Society 135: 126–146.

Bjerknes A, Totland Ø, Hegland S and Nielsen A (2007) Do alien plant invasions really affect pollination success in native plant species? Biological Conservation 138: 1–12.

Bobbink R, Hicks K, Galloway J et al. (2010) Global assessment of nitrogen deposition effects on terrestrial plant diversity: a synthesis. Ecological Applications 20: 30–59

Brook BW, Sodhi NS and Bradshaw CJA (2008) Synergies among extinction drivers under global change. Trends in Ecology & Evolution 23: 453–460.

Cadotte MW (2013) Experimental evidence that evolutionary diverse assemblages result in higher productivity. Proceedings of the National Academy of Sciences of the USA 110: 8996–9000.

Cadotte MW, Cardinale BJ and Oakley TH (2008) Evolutionary history and the effect of biodiversity on plant productivity. Proceedings of the National Academy of Sciences of the United States of America 105: 17012–17017.

Cadotte MW, Dinnage R and Tilman D (2012) Phylogenetic diversity promotes ecosystem stability. Ecology 93: S223–S233.

Cardinale BJ, Duffy JE and Gonzales A (2012) Biodiversity loss and its impact on humanity. Nature 486: 59–67.

Caswell H (2001) Matrix Population Models, 2nd edn. Sunderland, MA: Sinauer Associates.

Crone EE, Ellis MM, Morris WF et al. (2013) Ability of matrix models to explain the past and predict the future of plant populations. Conservation Biology 27: 968–978.

Crone EE, Menges ES, Ellis MM et al. (2011) How do plant ecologists use matrix population models? Ecology Letters 14: 1–8.

Dolman PM, Panter CJ and Mossman HL (2012) The biodiversity audit approach challenges regional priorities and identifies a mismatch in conservation. Journal of Applied Ecology 49: 986–997.

Ellner SP, Fieberg J, Ludwig D and Wilcox C (2002) Precision of population viability analysis. Conservation Biology 16: 258–261.

Ellner SP and Rees M (2006) Integral projection models for species with complex demography. American Naturalist 167: 410–428.

Faith DP (1992) Conservation evaluation and phylogenetic diversity. Biological Conservation 61: 1–10.

Flather CH, Hayward GD, Beissinger SR and Stephens PA (2011) Minimum viable populations: is there a ‘magic number’ for conservation practitioners? Trends in Ecology & Evolution 26: 307–316.

Hajjar R and Hodgkin T (2007) The use of wild relatives in crop improvement: a survey of developments over the last 20 years. Euphytica 156: 1–13.

Hilton‐Taylor C, Pollock CM, Chanson JS et al. (2009) State of the world's species. In: Vié J‐C, Hilton‐Taylor C, Stuart SN (eds) Wildlife in a Changing World. An Analysis of the 2008 IUCN Red list of Threatened Species, pp. 15–41. Gland: IUCN.

Honnay O and Jacquemyn H (2007) Susceptibility of rare and common plant species to the genetic consequences of habitat fragmentation. Conservation Biology 21: 824–831.

Imbach PA, Locatelli B, Molina LG, Ciais P and Leadley PW (2013) Climate change and plant dispersal along corridors in fragmented landscapes of Mesoamerica. Ecology and Evolution 3: 2917–2932.

Jeppsson T and Forslund P (2012) Can life history predict the effect of demographic stochasticity on extinction risk. American Naturalist 179: 706–720.

Keane RM and Crawley MJ (2002) Exotic plant invasions and the enemy release hypothesis. Trends in Ecology & Evolution 17: 164–170.

Killeen TJ and Solórzano LA (2008) Conservation strategies to mitigate impacts from climate change in Amazonia. Philosophical Transactions of the Royal Society B‐Biological Sciences 363: 1881–1888.

Lande R (1988) Genetics and demography in biological conservation. Science 241: 1455–1460.

MEA (Millennium Ecosystem Assessment) (2005) Ecosystems and Human Well‐Being. Washington: Island Press.

Merow C, Dahlgren JP, Metcalf CJE et al. (2014) Advancing population ecology with integral projection models: a practical guide. Methods in Ecology and Evolution 5: 99–110.

Mora C, Tittensor DP, Adl S, Simpson AGB and Worm B (2011) How many species are there on Earth and in the Ocean? PLoS Biology 9: e1001127.

Myers N, Mittermeier RA, Mittermeier CG, da Fonseca GAB and Kent J (2000) Biodiversity hotspots for conservation priorities. Nature 403: 853–858.

Nunez TA, Lawler JJ, Mcrae BH et al. (2013) Connectivity planning to address climate change. Conservation Biology 27: 407–416.

Ovaskainen O, Skorokhodova S, Yakovleva M et al. (2013) Community‐level phenological responses to climate change. Proceedings of the National Academy of Sciences of the USA 110: 13434–13439.

Rees M, Childs DZ and Ellner SP (2014) Building integral projection models: a user's guide. Journal of Animal Ecology 83: 528–545.

Rees M and Ellner SP (2009) Integral projection models for populations in temporally varying environments. Ecological Monographs 79: 575–594.

Reyer CPO, Leuzinger S, Rammig A et al. (2013) A plant's perspective of extremes: terrestrial plant responses to changing climatic variability. Global Change Biology 19: 75–89.

Schoen DJ and Brown AHD (2001) The conservation of wild plant species in seed banks. BioScience 51: 960–966.

Simberloff D (1998) Flagships, umbrellas, and keystones: is single‐species management passé in the landscape era? Biological Conservation 83: 247–257.

Shaffer ML (1981) Minimum population sizes for species conservation. BioScience 31: 131–134.

Srivastava DS, Cadotte MW, MacDonal AM, Marushia RG and Mirotchnick N (2012) Phylogenetic diversity and the functioning of ecosystems. Ecology Letters 15: 637–648.

Thijs KW, Brys R, Verboven HAF and Hermy M (2012) The influence of an invasive plant species on the pollination success and reproductive output of three riparian plant species. Biological Invasions 14: 355–365.

Thomas CD, Cameron A, Green RE et al. (2004) Extinction risk from climate change. Nature 427: 145–148.

Traill LW, Bradshaw CJA and Brook BW (2007) Minimum viable population size: a meta‐analysis of 30 years of published estimates. Biological Conservation 139: 159–166.

Traill LW, Brook BW, Frankham RR and Bradshaw CJA (2010) Pragmatic population viability targets in a rapidly changing world. Biological Conservation 143: 28–34.

Vilà M, Carrillo‐Gavilán A, Vayreda J et al. (2013) Disentangling biodiversity and climatic determinants of wood production. PLoS One 8(2): e53530.

Vilà M, Espinar JL, Hejda M et al. (2011) Ecological impacts of invasive alien plants: a meta‐analysis of their effects on species, communities and ecosystems. Ecology Letters 14: 702–708.

Wang J, Chagnon FJF, Williams ER et al. (2009) Impact of deforestation in the Amazon basin on cloud climatology. Proceedings of the National Academy of Sciences of the USA 106: 3670–3674.

Weeks AR, Sgro CM, Young AG et al. (2011) Assessing the benefits and risks of translocations in changing environments: a genetic perspective. Evolutionary Applications 4: 709–725.

WRI (2003) Millennium Ecosystem Assessment Ecosystems and Human Well‐Being. A Framework for Assessment. London: Island press.

Further Reading

Cook CN, Hockings M and Carter RW (2010) Conservation in the dark? The information used to support management decisions. Frontiers in Ecology and the Environment 8: 181–186.

Doak DF, Bakker VJ, Goldstein BE and Hale B (2014) What is the future of conservation? Trends in Ecology & Evolution 29: 77–81.

Hooper DU, Adair EC and Cardinale BJ (2012) A global synthesis reveals biodiversity loss as a major driver of ecosystem change. Nature 486: 105–108.

Kreft H and Jetz W (2007) Global patterns and determinants of vascular plant diversity. Proceedings of the National Academy of Sciences of the USA 104: 5925–5930.

Maxted N, Kell S, Ford‐Lloyd B, Dulloo E and Toledo A (2012) Toward the systematic conservation of global crop wild relative diversity. Crop Sciences 52: 774–785.

Nunney L and Campbell KA (1993) Assessing minimum viable population size: demography meets population genetics. Trends in Ecology & Evolution 8: 234–239.

Pyšek P, Jarošík V, Hulme PE et al. (2012) A global assessment of invasive plant impacts on resident species, communities and ecosystems: the interaction of impact measures, invading species' traits and environment. Global Change Biology 18: 1725–1737

Rands MRW, Adams WM, Bennun L et al. (2010) Biodiversity conservation: challenges beyond 2010. Science 329: 1298–1303

I am arguing for conserving plants and animals. I will discuss how plants and animals have an impact on our lives and how this would be dramatically changed if they weren’t conserved.

The word “conserve” means preservation, especially of the natural environment. In plants and animals case, it means,

To keep in existence, to retain and to keep safe from harm or loss.1

Thousands of plant and animal species are being terminated every year due to many factors such as: removal of habitat, food reduction, human threats etc. From the 1700’s to the year 2000, the number of species that have become extinct each year has soared from only 1 to 50,000. For example, the Mauritius dodo was extinct by 1690, Stellar’s sea cow by 1768 and the Great Auk by 1844. In 1990, there was only one of the Abingdon tortoises left in the world, and in 1952, the Balinese tiger became extinct. As the graph provided in the appendix 1 shows, the number of species becoming extinct as the years go on has increased dramatically in the last 30 years.

By the year 2025 the Earth could lose as many as one fifth of all species known to exist today. In recent centuries, hundreds of species have disappeared, almost always as a result of human activities. The passenger pigeon, one familiar example, was a source of food until excessive hunting and habitat loss caused its extinction in 1914. The North American bison, whose populations were decimated by settlers and market hunters in the 1800s, came close to sharing the same fate. Bison survive today only because of the efforts of early conservationists.

Food chains also play a part in the web of life.

Food-chain, a series of organisms each dependant on the next as a source of food.2

Every living organism on this earth is dependant on another. Humans rely on farm animals such as pigs, cows, sheep and chicken, as well as many other mammals. Animals such as leopards kill gazelle and zebra so they can feed. These are only a few examples of simple parts of complex food chains. Everything humans eat which is concerned with meat or plants, all get their food from another food source. It is the same for all organisms. This introduces an idea of the world being in a cycle, needing each other, and others needing them.

Ecosystem, a biological community of interacting organisms and their physical environment.3

The concept of ecosystems was first developed in the 1920’s and 1930’s. It takes into account the complex interactions between organisms-plants, animals, bacteria and fungi-that make up the community.

Species listed as endangered range from the largest animal on earth, the blue whale, to the majestic tiger, to the humble thick shell pond snail. Large or small, beautiful or ugly, all species play a role in the complex web of life. All of us depend on the natural resources of our planet. Each time a species is lost, the complexity, natural balance, and beauty of our world is diminished. And what threatens plants and animals ultimately threatens people as well.

The tiger (Panthera Tigris) is the largest member of the cat family. Other members of the same genus are the lion, leopard, and jaguar.

The rare Siberian tiger can measure up to 3 yards from nose to tip of tail. It weighs on average 500 pounds and can bound up to 30 feet in one leap.4

It also has thick yellow fur with dark stripes. From this information alone on only one sub-species of tiger, you can see that the extinction of this mammal would be a great loss to modern day society and the world we live in today

Take the tiger as a main example. This century has already seen major losses of wild tigers. By the 1950s tigers living in the Caspian Sea were extinct. Populations of tigers that once inhabited the islands of Bali and Java are now extinct. The last Bali tiger was killed in 1937 and the last Java tiger sighting occurred in 1972. India has the largest number of tigers with between three thousand and thirty and four thousand, seven hundred and thirty five.

The South China tiger, with at best twenty to thirty individuals is nearly extinct in the wild. It is estimated that only 5,100 to 7,500 individual tigers now remain in the entire world. These remaining tigers are threatened by many factors, including growing human populations, loss of habitat, illegal hunting and the species they hunt, and expanded trade in the tiger parts for traditional medicines.

One of the main reasons for poachers to kill tigers is their use in Chinese medicines. Tigers are worth more money dead than alive, which, if you think about it, is very sad indeed. Poachers who kill deer for their own purposes may not realise it but they are also destroying tiger’s one by one. Deer are one of the main sources of food for tigers and if they are cut down in numbers, ultimately so will the tiger’s be.

Already efforts are being done around the world to try to conserve the tiger and it’s other endangered companions. In India the local people sell paintings of tigers and other wildlife in order to try and support they’re local tigers. Also, in 1990, Indonesia passed a law to give all subspecies of tiger within its borders full protection. And in 1992, passed a bill stating that anyone in possession of tiger pelts, or parts must have them registered and would require a permit. China also made tiger bone illegal in 1993. Each of these things contributes to the effort of saving the tigers.

Elephant populations are also on the brink of extinction due to poachers who kill elephants for their ivory tusks. An international ban on ivory trade, instituted in 1989 by the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), has diminished the illicit ivory trade and reduced the killing. Over 120 countries, including Britain support the ban.

Efforts to save endangered species also include the propagation of breeding stock for release in the wild, either to restore a breeding population (as in the case of the peregrine falcon) or to augment a natural population (as in the case of the whooping crane). Due to breeding captivity, the number of known California condors has risen from 27 in 1987 to 52 in 1992. Another approach involves the determination of critical habitats that must be preserved for endangered species. This means to set aside certain habitats and make the preservation areas for endangered species.

Much has been done to make the need of animals well known and to start a method of saving some of these creatures, but a considerably smaller amount of work has been done to introduce the uses of plants. Plants are of a considerable value to man not only as a source of food but as medicines and cures.

All food on earth comes directly or indirectly from plants.5

Many drugs have been obtained from plants. The opium poppy, (papaver somniferum) has provided man with the drug Opium. More commonly known as Heroin. Although heroin is not used much in medicine, Opium is used for morphine, a strong painkiller. The plant digitalis, the common foxglove, provides the drug digitalis, which is a type of heart medication. It strengthens the contractions and lengthens the beats so that the relaxation time between beats is longer. The mandrake provides hyoscyamine, which is used for sedation of a patient before an operation, and the rosy periwinkle provides vincristine, a treatment for leukaemia.

About 25 per cent of all medicines contain one or more active ingredients derived originally from flowering plants.6

It is thought that at least 2000 different plant species may contain anti-cancer properties.7

Although plants can be used as food and as some forms of medication, they can also be a poison. For example, Oleander is a source for rat poison. The
leaves and seed of the yew contain a strong alkaloid poison that can cause sudden heart failure, without any warning symptoms, and although belonging to a plant family that includes certain vegetables, many forms of nightshade are highly poisonous.

In drawing a summary to these arguments I conclude that we should conserve animals for many reasons. One of them mainly being because of the effect it would have on the world and its surrounding creatures. Food chains would be highly displaced, for example, if tigers were extinct, the food that they eat would escalate and in turn, their food would plummet. Deer would be on the increase as there would be no tigers to eat them and their surrounding habitats would decrease dramatically as the deer would need more food. As more creatures become extinct the effect will not only be to animals but to humans as well. Earth is a beautiful planet full of millions of different species of creatures in all shapes, size and form. Let’s make sure we keep it that way.