Vegetation Types Research Articles

The Science of Vegetation with Reference to India

Pt. I Vegetation is the sum total of plant population covering a region and its descrete units circumscribed by characteristic environment, are communities. The species content is the flora. The physical and the biological surroundings characterise the environmental complex. Both plants and their environment are dynamic systems interacting within and with each other. The amplitude of variations in the environment is generally met with synchronised adaptive responses of the plants in time and space. Differentiation of ecads and ecotypes within the plastic species is the result. However, many forms and invaders may get eliminated also if the situation goes beyond their range of tolerance set by the genetic organisation as the factors may become critical at different stages of the life-cycle. The species around provide the genetic material for recruitment and ecesis within the community.pt. II Migration of species involving mobility of disseminules, their germination, aggregation, competition and final ecesis-ever continuing processes lead to colonisation and invasions. All these plant phenomena react upon the environment introducing changes therein. Thus newer community-environment-complex equilibria are set up in the dynamic system. The whole process is called, succession in relation to time and the series of succeeding communities for a given area, a sere. When it happens ‘de novo’ with no trace of plant present originally in the area, it is prisere as a result of primary succession and subsere with disturbed communities in which secondary succession is the rule. The mechanism of succession is driven by the reacting and changing environment consequential largely either to the plant processes themselves or to extraneous forces succession is autogenic in the former and allogenic in the latter case. In every case succession terminates into a more stable climax community generally dependant upon the climate and soil. The taxa used for classifying communities differ widely among ecologists but association is the basic unit accepted by all, though with varying concepts. The concept of ecosystem in relation to energy and matter within the community is the most acceptable basis for comprehending;vegetation types in India.Pt. III Since vegetation evolves out of the flora floristic regions of India should form the basis of its main divisions. For this purpose three main latitudinal belts viz. (1) Eastern and Western Himalayas, (2) Assam, Gangetic Plains and Rajasthan, and (3) Deccan and Malabar are recognised. The seven provinces with their distinct climate including photoperiod can be individually considered for the description of vegetation types along gradients of altitude, humidity-aridity, history and proximity of human settlements and soil fertility. Along these gradients closed, open and desert types of structure within forests, scrub and grass can be described with their combinations wherever necessary. Physiognomy, structure, function, composition, dynamics, habitat relations and history are the important diagnostic criteria of vegetation types. Size, texture and seasonal behaviour of leaves of dominant species may also be given. The hydrophytes can be described in each place as floating, suspended, submerged anchored, floating-leaved anchored and emergent anchored.

Mapping of Vegetation and Environmental Conditions

There are various methods of vegetation mapping which depend upon the scale of the work and the facts to be shown. Professor H. GAUSSEN’s method has proved as successful in Tropical India as in temperate and mediterranean regions. It aims at representing the vegetation types at medium and small scales.(1) The basic principle is the use of colours of an ecological value. Among the factors of the environment, only those which play a part in the water equilibrium of the vegetation will be shown and the combination of their colours will become representative of the ecology.High temperature and long dry period will increase the evaporation. Rainfall and relative humidity 'will be favourable to the plant growth. Then a conventional, but natural choice of blue and violet shades for humidity, and on the other hand, red or yellow shades for heat and drought will provide all the coloration possibilities.Six classes are defined for Temperature, Rainfall and Xerothermic index (length and intensity of the dry season). Each class has its conventional shade. In any place the climate is easily summarised into an ecological formula which will include for more precision the light factor, the vegetative period and the soil factor.Soil factor is taken into account:-either by its effect on the water balance. The colour is shaded accordingly, for instance, the mangrove, the vegetation of saline soils ;-or by its limiting effect on the floristic composition of the vegetation types. For example, the lateritic caps. These features are shown by the superimposition of a symbol.(2) Another originality of the method is the representation of "Series.of Vegetation". Various physiognomic stages of degradation of the same series are shown by means of lines, stripplings etc. But the same colour, representative of the general ecology of one series is used for all its serial stages.Floristic releves are made in the field. Their comparison brings out the relationship between the successive stages of the series and leads to the most developed type possible under the present ecological conditions. This maximum stage, the least disturbed by biotic factors, is the "plesioclimax". It is the maximum vegetation to be expected under present conditions if human interference it excluded. Its characteristic and dominant species axe used to name the series.The plesioclimax helps to appreciate the ecological-potentiality of the place and therefore will be of some guidance for the introduction of new species.Since similar colours are used for similar climates in the world, the colours show homo-bioclimates under which grow similar vegetation, types even if their floristic composition is different.Several examples are taken from vegetation maps of Tunisia, Algeria, and South India.

Additions to the Flora of Rajpipla Forest Division, Gujarat

In this paper 202 more angiosperms are listed of which 118 are dicotyledons and 83 are monocotyledons, based on collections made between 1965 and 1971 from different areas of the Rajpipla forest division. Such additions are due to (1) intensive exploration in all seasons and (2) two distinct types of vegetations (a) the dry deciduous type in hilly regions and (b) the scrub forest type in the undulating plains

Studies on the Vascular Flora of Sultan's Battery and Chedaleth Forest Ranges, Kozhikode District, Kerala

This paper deals with all the vascular plants of Sultan's Battery and Chedaleth ranges, Kozhikode Dt., Kerala collected during the year 1964-65. The ranges lie between 8° & 12°N and 76° & 80°E. Various types of vegetation ranging from tropical evergreen, semi-evergreen, moist and dry deciduous to scrub are seen. Altogether 528 plants, spread over 87 families and 370 taxa are enumerated. From a careful study of literature and collections made earlier by others and presently kept in the herbarium of the Southern Circle, Botanical Survey of India, twelve new records for the area are discovered.

A Contribution to the Flora of Bori Reserve Forests, Hoshangabad District, Madhya Pradesh

The study of the flora of Bori Reserve Forests, Hoshangabad District, Madhya Pradah has been undertaken during the years 1960 and 1961. The area stretches between 77°45' to 78°30' E. long. and 22°15' to 22°30' N. lat. on the southern slopes ef Satpura range. As a result of three seasonal visits 432 taxa belonging to 317 genera of 92 families could be collected and studied. The flora presents a typical dry deciduous type of vegetation without any change in the main components throughout. Some of the common species of plants in this forest are Anogeissus latifolia, Adina cordifolia, Aegle marmelos, Diospyros melanoxylon, Grewia tiliaefolia, Buchanania lanzan, Helicteres isora, Celastrus paniculata, Baliospermum montanum and Emblica officinalis. The area under study lacks in hydrophytic vegetation as there is hardly any perennial natural water source. Similarly orchids and ferns are also rare.

A Botanical Tour to Tirap Frontier Division, NEFA (India)

A botanical tour in the southern parts of Tirap Frontier Division lying to the south-east of the Margherita-Nampong-Pangsupass line and bordering upon Burma and Manipur, undertaken over a period of 20 days during August-September, 1958, pelded 518 species of angiosperms and 120 species of pteridophytes amongst others. This paper presents the geology, topography, soil and vegetation together with a comprehensive analysis of the floristic composition of the vegetational types and is followed by enumeration of the species of angiosperms in the Appendix.Analysis of the species collected and belonging to angiosperms established the following ten families as the richest ones on the basis of the number of species. Orchidaceae (50), Rubiaceae (29), Gramineae (28), Urticaceae (27), Leguminosae (21), Compositae (19), Cyperaceae (19) and Gesneraceae (17), Verbenaceae (12), Labiatae (12). These together represent about 45% of the species collected. About 68 species not recorded by Kanjilal et al(1934-1940) have been reported as additions to the dicotyledonous flora of Assam and NEFA. Several are reported here as new records of species for India.

Biodiversity and Wetting of Climate Alleviate Vegetation Vulnerability Under Compound Drought‐Hot Extremes

AbstractGlobal warming has intensified the intensity of compound drought‐hot extremes (CDHEs), posing more severe impacts on human societies and ecosystems than individual extremes. The vulnerability of global terrestrial ecosystems under CDHEs, along with its key influencing factors, remains poorly understood. Based on multiple remote sensing data, we construct a Vine Copula model to appraise vegetation vulnerability under CDHEs, and attribute it to climatic and biotic factors for five different vegetation types. High vulnerability is detected in central and southern regions of North America, eastern and southern regions of South America, Southern Africa, northern and western Europe, and northern and eastern Australia. The drier the climate, the higher will be the vulnerability. Furthermore, biodiversity and biomass are key biotic factors influencing the vulnerability of various vegetation types, such that ecosystems with richer biodiversity and higher biomass have lower vulnerability to CDHEs. The findings deepen understanding of terrestrial ecosystem response to CDHEs.

Investigating the impact of tropical deforestation on Indian monsoon hydro-climate: a novel study using a regional climate model

AbstractThis study uses a state-of-the-art regional climate model (RCM) to examine how tropical deforestation affects the meteorology of the Indian Summer Monsoon (ISM). Incorporating insights from existing research on deforestation by climate scientists, alongside evidence of environmental deterioration in semi-arid, hilly and tropical regions of Southeast Asia, this research seeks to elucidate the critical influence of anthropogenic reasons of climate change on the hydroclimate of ISM. Employing “tropical deforestation” design experiments with the ICTP-RegCMv4.4.5.10 RCM the study evaluates the effects on meteorological parameters including precipitation, circulation patterns and surface parameters. This experimental design entails substituting vegetation type in the land use map of RegCMv4.4.5.10 model, such as deciduous and evergreen trees in Southeast Asia with “short grass” to mimic tropical deforestation. Findings reveal that deforestation induces abnormal anti-cyclonic circulation over eastern India curtails moisture advection, diminishing latent heat flux and moisture transport, leads to a decrease in precipitation compared to control experiment scenario. Alterations in albedo and vegetation roughness length attributable to deforestation impact temperature, humidity, precipitation, consequently exacerbating drought and heatwave occurrences. Additionally, the study also explores deforestation-induced feedback on ISM precipitation variability. The study concludes that deforestation substantially alters land-surface characteristics, water and energy cycle, and atmospheric circulation, thereby influencing regional climate dynamics. These findings offer foundational insights into comprehending land-use and land-cover changes and their implications for climate change adaptation strategies.

Dry Deciduous Forests of the Poona District, Deccan, India

The deciduous vegetation grows in various ghats and hills in the Poona district. The present note describes the type from the Katraj ghats, on the south of Poona at a distance of 6 miles.The area consists of flat plateau at the top, eastern and western slopes and narrow valleys through which small rivulets flow during monsoons. The mountains are formed of trap rock, the strata of which dip towards east. Thus the eastern slopes are gentle with better developed soil but the western escarpments are steep comparatively dry with shallow soil. Seepage water is seen on eastern slope during monsoon. Alluvial soil deposits in the valley. The average rainfall is about 27".The following vegetation types are described:(I) Top of the plateau: They are mainly covered with Boswellia serrata which is regenerating profusely where biotic interference is excluded and the soil is dry shallow and gravelly.(II) The western slopes: These slopes bear a low type of forest. The following trees are common-Boswellia serrata, Lannea coromandelica, Diospyros montana and Largerstroemia parviflora. Shrubs-Acacia sp., Lantana camara, Zizyphus xylopyrus, Rhus mysorensis, Flacourtia, Cipadessa baccifera, Gymnosporia spinosa and Securinega sp.Herbs-Tridax procumbens, Leucas sp., Cocculus sp., Polyzygus tuberosus, Sida sp., Arisaema sp., Desmodium sp., Acanthospermum hispidum, Celosia sp. etc.This vegetation is also affected adversely by the biotic interference since lopping, coppicing and grazing are prevalent.(III) Eastern slope (top portion) ; It bears a community of Boswellia serrata-Diospyros montana-Lannea coromandelica on dry shallow and rocky soil. The commonest shrubs are Acacia sp., Zizyphus xylopyrus, Lantana camara, Cryptolepis buchanani, Woodfordia fruticosa, Cissuspallida and Securinega sp.The common herbaceous vegetation consists ot Locculus sp., Leucas sp., Tridax procumbens, Curculigo sp., Polyzygus tuberosus, etc.(IV) Eastern slope (lower portion): It bears a community of Tectona grandis-Lannea coromandelica-Diospyros-Boswellia serrata.Teak and Lannea coromandelica are predominant on the alluvial deposits towards the valley and higher up. Diospyros sp. and Boswellia become prominent in dry trap soil. Diospyros on alluvial soils is heavily infected by Viscum. But incidence of the parasite decreases in trees which are growing on dry trap rocks elsewhere in the area. Commonest shrubs in the community are Acacia sp., Clerodendron serratum, Zizyphus xylopyrus, Cissus pallida and Lantana camara. Commonest herbs are Leucas sp., Tridax procumbens, Hemidesmus indicus, Curcuma montana, Cocculus sp., Polyzygus tuberosus, Trichodesma sp., Crotalaria sp., Indigofera sp., Celosia sp., Aerva javanica, etc.Various stages of succession are seen in the area and regeneration of teak, Boswellta, Lagerstroemia. Lannea is common on different types of soils.

Biomass Burning Aerosol Observations and Transport over Northern and Central Argentina: A Case Study

Biomass Burning Aerosol Observations and Transport over Northern and Central Argentina: A Case Study

Dynamic process of ecosystem water use efficiency and response to drought in the Yellow River Basin, China

Ecosystem water use efficiency (WUE) is a crucial indicator of the impact of climate change on terrestrial ecosystems, reflecting the balance between biological processes (photosynthesis and transpiration) and physical processes (evapotranspiration). However, the response mechanisms and driving processes of WUE to drought remain to be further understood. In this study, we analyzed the spatial and temporal dynamics and response mechanisms of WUE in the Yellow River Basin (YRB) using data on Gross Primary Productivity (GPP), Evapotranspiration (ET) and Standardized Precipitation Evapotranspiration Index (SPEI), which revealed the cumulative effect of drought on WUE and assessed the ecosystem's resilience. The study results showed that (1) GPP, ET and WUE in the YRB exhibited a significant increasing trend, with 63.04 % of the area showing a marked increase in WUE. (2) GPP was the dominant factor influencing WUE in 65.36 % of the area, particularly in cropland and grassland, while ET was more influential in forested areas. Vapor pressure deficit (VPD) was identified as the principal driver affecting vegetation GPP in semi-arid and semi-humid regions of the YRB. In contrast, soil moisture (SM) was the limiting factor in arid areas. (3) 71.00 % of the WUE in the basin was affected by drought cumulative effects, with an average cumulative duration of 4.5 months. Arid regions experienced the most extended duration of 7.29 months, compared to 3.05 months in semi-humid regions. (4) 74.85 % of the regional ecosystems exhibited ecological resilience to drought, particularly in the source areas of the western basin of the YRB. Shrublands have the highest drought resilience among vegetation types, while grasslands have the lowest. The resilience of each climatic zone was in the order of semi-humid, semi-arid, and arid order. This study comprehensively analyzed of the spatial and temporal dynamics and response mechanisms of WUE in the YRB, offering a new perspective and scientific basis for understanding and predicting the ecosystem response to climate change.

Topsoil phytolith assemblages are related to precipitation via different vegetation types in Northeast China

The characteristics of topsoil phytolith assemblages can reflect the local vegetation and climatic conditions. We collected 53 topsoil samples along an isotherm corresponding to a mean annual temperature (MAT) of 4 °C in Northeast China, 20 samples were from the Daxing'an Mountains (DXAM), 18 samples from the Songnen Plain (SNP), and 15 samples from the Changbai Mountains (CBM). The phytoliths were classified into 13 morphological categories. We observed significant differences between the phytoliths assemblages from the DXAM, SNP, and CBM, and they could be statistically discriminated with a total accuracy of 81.1 %. ELONGATE percentages were more sensitive to MAT than to mean annual precipitation (MAP). There was a significant positive correlation between the percentages of ELONGATE, PTERIDOPHYTE-TYPE, PAPILLATE and MAP; and a significant negative correlation between the percentages of BILOBATE and MAP. We constructed a phytolith index (D/W) based on the common phytolith types, which reflects changes in environmental humidity: D/W = BILOBATE / (BILOBATE + ELONGATE); the higher the value of D/W the drier the environment, and vice versa. In Northeast China, D/W varied from 0.0 to 0.6, with the average of 0.3. D/W < 0.3 corresponded to a relatively humid climate, and D/W > 0.3 corresponded to a relatively dry climate.

Climate, wildfire, and volcanic ash drivers of ecosystem change in high mountain forests, British Columbia, Canada

Northwest North America has unique high elevation &lt;i&gt;Picea-Abies&lt;/i&gt; forests and parkland classified in British Columbia as the Engelmann Spruce-Subalpine-fir (ESSF) Biogeoclimatic zone. These ecosystems occur on a topographically and climatically complex landscape, juxtaposed with diverse vegetation types including alpine tundra, inland rain forest, dry conifer forest, and grasslands. Spatio-temporal ecosystem disturbance is varied, driven by factors such as climate variation, wildfire, volcanic eruptions, and insect herbivory. A pollen and charcoal record derived from a lake sediment core from the ESSF reveals a unique late-glacial to modern vegetation history progressing from alpine steppe through dry open conifer forest to moist spruce-fir ecosystems, the latter arising only 4600 years ago; late by comparison to other ESSF sites in the region. Repeated disturbance in the mid Holocene by wildfire coupled with volcanic ash deposition and increased climatic variation resulted in recurring &lt;i&gt;Pinus contorta&lt;/i&gt;-dominated seral forest stands before cooling and moistening in the late Holocene led to stable &lt;i&gt;Picea-Abies&lt;/i&gt; forest. With rapid climate change, changing disturbance regimes, and timber harvest, the management of dry ESSF forests needs to consider that this forest-type could transform into parkland or open seral pine stands, with a high frequency disturbance regime.

Studies on the Flora of the Andaman Islands

Studies and observations, made on the flora of the Andaman Islands during a botanical exploration tour in 1959, are recorded in this paper. Andamans are a group of large and small islands 204 in number, lying in the Bay of Bengal between 13°41'and 10°30' N. latitudes, and 92°11'and 93°7'E. longitudes.Important vegetation types commonly met with in these islands are the Mangrove forests, Beach forests, Deciduous forests and Evergreen forests at lower and higher elevations. The floristic composition of the South, Middle, and North Andamans are described in detail. A floristic analysis of the Andaman Islands, based on the collections made during the above tour is presented. An enumeration of the plants collected, is given at the end.

Ecological Studies on the Soil and Vegetation of Krusadi Group of Islands in the Gulf of Manaar

The account presents the plant ecology with a description of soils and other related features of the Krusadi group of islands situated in the Gulf of Manaar approximately between 9°14'-9°15'N and 79°10.5'-79°14.5' E. Data on pH, organic matter contents, total soluble salts, sodium chloride contents and calcium carbonate contents in the soils of different habitats are presented in tabular form and an attempt made to correlate vegetation with the soil features. A classification of vegetation situations rather than strictly vegetation type has been brought out and comparison made with the main neighbouring island of Rameswaram with similar climate. The paper includes a vegetation map of the area prepared during the field work.

A Botanical Tour to Subansiri Frontier Division (NEFA)

A botanical collection tour along the 100 Km. road track passing through, the Dafla hills and Apatanang valley and lying between Kimin (213 m.) and Ziro (1525 m) in the Subansiri F.D., undertaken during September 1959 yielded 383 species of angiosperms and 66 species of Pteridophytes amongst others. This paper presents the topography, climate and vegetation together with a comprehensive analysis of the floristic composition of the vegetational types and is followed by enumeration of the species in the appendix.Vegetation in the Dafla hills area visited is ascribed to tropical evergreen forest from Kimin to Pitepool and to subtropical evergreen forest, and grassland formation between Kherbari and Hapoli, the last one representing a biotic climax.Apatanang valley is a flat alluvial plain of about 20 sq. miles representing the bed of dried up lake and is very suitable for rice and millet cultivation. Pinus wallichiana and Dendrocalamus sikkimensis are extensively planted in the surrounding hillocks.The analysis of the distribution data shows the occurrence of a large number of species in the area as common to neighbouring. region e.g. Assam sharing 260 species; Sikkim, 119 species; Western Himalayas, 107 species; Burma, 51 species; Manipur, 15 species; Bengal, 29 species; Bihar and Orissa, 13 species and Deccan Peninsula, 28 species.Borreria ocymoides, Torenia asiatica and Cyanotis papilionacea, so far reported as restricted to Deccan Peninsula, Impatiens porrecta, I. paludosa and Solanum khasianum, as enemic to Khasia hills, Argyreia wallichii as endemic to Sikkim, Exacum tetragonum var. stylosa and Dendrobium chrysotoxum reported by Hooker from Burma have now been collected from Subansiri F.D.

Production of vegetables with biofertilizers based on native microorganisms: A case study in Tixtla, Guerrero, Mexico

In agriculture, the use of fertilizers has increased due to the high demand for food by humanity, causing negative impacts because of high production costs and soil contamination. We evaluated five biofertilizers based on native microorganisms promoters of plant growth (NMPPG) as an alternative to the fertilizers used by small vegetable producers. The evaluation was carried out with three types of vegetables (lettuce, celery and epazote) in the Juan Berbera Catalán Irrigation Unit made up by producers from the community of Tixtla, Guerrero. The results show that Rhizobium sp. R01 (Tx3), Azotobacter sp. C3 (Tx1) and Bacillus licheniformis M2-7 (Tx5) used as biofertilizers promote germination and considerably increase fresh weight in these crops, and Azospirillum sp. M9 (Tx2) and Trichoderma sp. ABC1 (Tx4) present significant differences with the negative and chemical control. The yield of lettuce, celery and epazote was favored using biofertilizers, which can be considered a good alternative to apply to these crops, likewise, the price of biofertilizers (5 liters per Tx) compared to the fertilizer DAP-18-46-00 (50 kg) used by the same producers is $1,200.00 vs. $2,000.00 MXN per hectare produced respectively. In conclusion, the biofertilizers used herein represent a feasible alternative for farmers without disregarding the need for technical specialists and producers to identify optimal conditions that support the sustained application and management of biofertilizers.

Investigating net primary production in climate regions of Khuzestan Province, Iran using CASA model.

This study aimed to investigate the vegetation production changes in Khuzestan province, Iran using MODIS data production, meteorological data, vegetation maps as well as topographic and field monitoring data in CASA model. The study area was divided into different climatic classes based on multivariate statistical method, so the vegetation of each climatic region was examined separately for changes in NPP values. Production changes due to degradation were calculated using the Miami model and subsequently, the rain use efficiency (RUE) and the light use efficiency (LUE) and correlation indices between the CASA model and ground data were determined. The results of this study (R2) showed that the accuracy of this model varies depending on the type of climatic regions (R2 = 0.80 to R2 = 0.15). In different climatic regions, the rate of NPP changes (very humid 68 gC/m2 to ultra-dry 15 gC/m2) varies in rangeland types. The highest rate of vegetation production is observed seasonally in May. Degradation conditions also reduced RUE and LUE. However, in hyper-arid regions, adaptations of plants in some different species (Hammada Spp.) increase their efficiency compared to other vegetation types. The results showed the importance of vegetation and climate classification in vegetation production studies.

Use of Non-Chlorine Sanitizers in Improving Quality and Safety of Marketed Fresh Salad Vegetables

The safety of vegetable food is compromised by various factors, including the inefficient or excessive use of sanitizers. Instances of individuals falling ill after consuming raw vegetables have been reported, with outbreaks of diseases caused by pathogens on fresh vegetables becoming increasingly prevalent globally, attracting significant media coverage and impacting the economic viability of vegetable cultivation. Measures to enhance food safety in postharvest horticultural produce involve controlling microbial proliferation and minimizing cross-contamination. Sanitizers were utilized in the food safety arsenal for a variety of purposes, including pathogen elimination and microbe reduction, hand, tool, and vegetable contact surface cleaning, and produce shelf-life extension. Choosing an appropriate sanitizer for all vegetables is difficult due to a lack of knowledge on which sanitizers are ideal for the many types of vegetables grown on farms under different environmental circumstances. Although chlorine-based sanitizers, such as sodium or calcium hypochlorite, have been widely used for the past 50 years, recent research has revealed that chlorine reacts with an organic compound in fresh vegetables to produce trihalomethane, a carcinogen precursor, and as a result, many countries have prohibited the use of chlorine in all foods. As a result, horticulture research groups worldwide are exploring non-chlorine, ecologically friendly sanitizers for the vegetable industry. They also want to understand more about the present procedures in the vegetable business for employing alternative sanitizers, as well as the efficacy and potential dangers to the food safety of fresh salad vegetables. This review paper presents detailed information on non-chlorine sanitizers, such as their efficacy, benefits, drawbacks, regulatory requirements, and the need for additional research to lower the risk of marketed salad vegetable food safety.

Associations of vegetable and potato intakes with markers of type 2 diabetes risk in the AusDiab cohort.

The associations of vegetable and potato intakes with type 2 diabetes (T2D) appear to be nuanced, depending on vegetable types and preparation method, respectively. We investigated the associations of total vegetable, vegetable subgroup, and potato intakes with 1) markers of T2D at baseline and 2) incident T2D cumulative over a 12-year follow-up period in Australian adults. Using data from the Australian Diabetes, Obesity and Lifestyle Study, intakes of vegetables and potatoes were assessed via a food frequency questionnaire at baseline. Associations between vegetable intake and 1) fasting plasma glucose (FPG), 2-hour post load plasma glucose (PLG), updated homeostasis model assessment of β-cell function (HOMA2-%β), HOMA2 of insulin sensitivity (HOMA2-%S), and fasting insulin levels at baseline and 2) cumulative incident T2D at the end of 12-year follow-up were examined using generalized linear and Cox proportional hazards models, respectively. In total, 8,009 participants were included having median age of 52 years, and vegetable intake of 132 g/day. Higher intake of total vegetable, green leafy, yellow/orange/red, and moderate intakes of cruciferous vegetables was associated with lower PLG. Additionally, higher green leafy vegetable intake was associated with lower HOMA2-%β and serum insulin. Conversely, higher potato fries/chips intakes were associated with higher FPG, HOMA2-%β, serum insulin, and lower HOMA2-%S. Participants with moderate cruciferous vegetables intake had a 25% lower risk of T2D at the end of 12 years follow-up. A higher intake of vegetables, particularly green leafy vegetables, may improve while consuming potato fries/chips, but not potatoes prepared in a healthy way, may worsen glucose tolerance and insulin sensitivity. Our findings suggest a nuanced relationship between vegetable subgroups and their impact on glucose tolerance.