A handbook of protocols for standardised and easy measurement of plant functional traits worldwide

Cornelissen, J. H. C.; Lavorel, Sandra; Garnier, Éric; Dı́az, Sandra; Buchmann, Nina; Gurvich, Diego E.; Reich, Peter B.; Steege, Hans ter; Morgan, Huw D.; Heijden, Marcel G. A. van der; Pausas, Juli G.; Poorter, Hendrik

doi:10.1071/bt02124

Cited by 3,384 publications

(3,626 citation statements)

References 307 publications

Supporting

Mentioning

3,233

Contrasting

Unclassified

184

Order By: Relevance

“…Cinco indivíduos por espécie com alturas semelhantes foram selecionados. Em cada indivíduo 10 folhas expostas ao sol foram coletadas, colocadas em papéis toalha umedecidos e acondicionadas por duas horas em caixa térmica refrigerada por gelo (Cornelissen et al 2003). Conforme o protocolo proposto por Cornelissen et al (2003), as folhas foram reidratadas em câmara úmida por 6 à 8 horas, logo após, determinamos a massa fresca (MF; mg).…”

Section: Traços Funcionais Foliaresunclassified

“…Em cada indivíduo 10 folhas expostas ao sol foram coletadas, colocadas em papéis toalha umedecidos e acondicionadas por duas horas em caixa térmica refrigerada por gelo (Cornelissen et al 2003). Conforme o protocolo proposto por Cornelissen et al (2003), as folhas foram reidratadas em câmara úmida por 6 à 8 horas, logo após, determinamos a massa fresca (MF; mg). A área foliar (AF; cm 2 ) foi determinada através da digitalização das folhas em scanner de mesa e as imagens analisadas no software image J v.1.44.…”

Section: Traços Funcionais Foliaresunclassified

See 1 more Smart Citation

Divergências funcionais e estratégias de resistência à seca entre espécies decíduas e sempre verdes tropicais

et al. 2015

View full text Add to dashboard Cite

ResumoAnalisamos a variação funcional entre espécies decíduas (ED) e sempre verdes (ESV) para compreender as divergências nas estratégias de tolerância e evitação à seca. O estudo foi realizado em um fragmento de floresta tropical sazonalmente seca, localizada no munícipio de Pentecoste (3°47'S, 39°16'W), Ceará, Brasil. Mensuramos 17 traços funcionais foliares em 17 ED e cinco ESV, sendo 12 morfofuncionais, um fenológico e quatro fisiológicos. Verificamos que as ED exibiram maior taxa de fotossíntese por massa (A massa ), menor longevidade foliar (LF) e massa foliar específica (MFE) quando comparadas às sempre verdes. Esses traços foram considerados traços-chaves preditores das estratégias de evitação e tolerância à seca. As ED e ESV apresentaram uma demanda conflitante entre tolerância à seca e taxa fotossintética, pois a LF foi negativamente correlacionada com à A massa . Embora tenham demonstrado diferenças claras na MFE e LF não observamos diferenças significativas na A área e g s , consequentemente, ED e ESV não diferiram na eficiência no uso da água durante o período chuvoso. Apesar da variabilidade substancial dentro do grupo, todas as ED exibem estratégia de evitação à seca enquanto que ESV exibem um conjunto de traços funcionais foliares relacionados a estratégia de tolerância à seca. Palavras-chave: Grupos fenológicos, tolerância à seca, evitação à seca. AbstractWe analyzed the functional variation between deciduous and evergreen species to understand the differences across the strategies of avoidance and tolerance to drought. Our study was carried in a fragment of seasonally dry tropical forest located in the city of Pentecoste (3°47'S, 39°16'W), Ceará, Brazil. We measured 17 functional leaf traits in 17 deciduous and five evergreen species, being 12 morphofunctional, one phenological and four physiological. We found that deciduous species exhibited greater A mass , lower leaf lifespan (LL) and leaf mass per area (LMA) than evergreen species. These traits were considered key predictor traits of avoidance and drought tolerance strategies. Deciduous and evergreen species showed a trade-off between drought tolerance and photosynthetic rate, LL was negatively correlated with A mass . Although we have shown clear differences in LMA and LL not observed significant differences in A area and g s , consequently, deciduous species and evergreen species did not find significant differences in WUE i and WUE. Despite substantial variability within the group, all deciduous species fall predominantly in the drought avoidance strategy, while evergreen species display a suite of traits related to drought tolerance.

show abstract

Section: Traços Funcionais Foliaresunclassified

Divergências funcionais e estratégias de resistência à seca entre espécies decíduas e sempre verdes tropicais

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Then, we selected all species with at least one individual in each treatment to allow comparisons. In each individual of the species included in the analysis, we randomly tagged leaves from the third or fourth nodes, as long as the leaves were fully expanded and without obvious symptoms of herbivore or pathogen damage (Cornelissen et al, 2003).…”

Section: Methodsmentioning

confidence: 99%

The 'Herbivory Uncertainty Principle': application in a cerrado site

Gadotti

Batalha

2010

Braz. J. Biol.

View full text Add to dashboard Cite

Researchers may alter the ecology of their studied organisms, even carrying out apparently beneficial activities, as in herbivory studies, when they may alter herbivory damage. We tested whether visit frequency altered herbivory damage, as predicted by the 'Herbivory Uncertainty Principle'. In a cerrado site, we established 80 quadrats, in which we sampled all woody individuals. We used four visit frequencies (high, medium, low, and control), quantifying, at the end of three months, herbivory damage for each species in each treatment. We did not corroborate the 'Herbivory Uncertainty Principle', since visiting frequency did not alter herbivory damage, at least when the whole plant community was taken into account. However, when we analysed each species separately, four out of 11 species presented significant differences in herbivory damage, suggesting that the researcher is not independent of its measurements. The principle could be tested in other ecological studies in which it may occur, such as those on animal behaviour, human ecology, population dynamics, and conservation.Keywords: cerrado, herbivory, savanna, Uncertainty Principle. O 'Princípio da Incerteza da Herbivoria': aplicação em uma área de cerrado ResumoPesquisadores podem alterar a ecologia de seus organismos estudados, mesmo conduzindo atividades que são aparentemente benéficas, como em estudos sobre herbivoria, quando podem alterar a quantidade de dano foliar nas plantas. Testamos se a visita do pesquisador alterou o dano por herbivoria, como prevê o Princípio da Incerteza da Herbivoria. Em um fragmento de cerrado no Estado de São Paulo, estabelecemos 80 parcelas em que amostramos os indivíduos arbustivos ou arbóreos. Usamos quatro frequências de visitação (alta, média, baixa e controle), quantificando, ao fim de três meses, o dano por herbivoria por espécie em cada tratamento. Não corroboramos o Princípio da Incerteza da Herbivoria, uma vez que a frequência de visitação não alterou o dano por herbivoria, ao menos quando analisamos todas as espécies simultaneamente. Porém, quando analisamos as espécies separadamente, quatro das onze espécies amostradas apresentaram diferenças significativas, sugerindo que o pesquisador não é independente de suas medições. Esse princípio pode ser testado em outros estudos ecológicos em que possa ocorrer, como nos de comportamento animal, etnoecologia, dinâmica de populações e conservação.

show abstract

“…The same leaves used for the determinations of leaf area were dried at 60 °C to a constant weight (72 h) (Cornelissen et al 2003) and weighed on an analytical balance to calculate total leaf dry mass per shoot. Shoot lengths were was measured with a millimeter ruler and their dry masses determined by drying at 60 °C for 72 h (Cornelissen et al 2003) and weighing, following the same procedures used for the leaves.…”

Section: Leaf Area Shoot and Leaf Dry Mass And Shoot Lengthmentioning

confidence: 99%

“…Shoot lengths were was measured with a millimeter ruler and their dry masses determined by drying at 60 °C for 72 h (Cornelissen et al 2003) and weighing, following the same procedures used for the leaves.…”

Section: Leaf Area Shoot and Leaf Dry Mass And Shoot Lengthmentioning

confidence: 99%

Relationships between crown architecture and available irradiance in two cerrado species with different leaf phenologies

Santos¹,

Consolaro²,

Moreno³

et al. 2012

Braz. J. Bot.

View full text Add to dashboard Cite

-(Relationships between crown architecture and available irradiance in two cerrado species with different leaf phenologies). Structural differences between cerrado species with different leaf phenologies are linked to crown architecture, leaf production, and biomass allocation to shoots and leaves. The present study characterized crown structures and the patterns of biomass allocation to leaves and shoots in two woody cerrado species with contrasting leaf phenologies and quantifi ed the irradiance reaching their leaves to determine the best period during the day for photosynthetic activity. The shoots and leaves of fi ve individuals of both Annona coriacea (deciduous) and Hymenaea stigonocarpa (evergreen) were collected along a 50 m transect in a cerrado fragment within the urban perimeter of Catalão -GO, to determine their patterns of biomass allocation in their crowns. The evergreen H. stigonocarpa had signifi cantly higher mean values of shoot inclination (SI), petiole length (PL), leaf area (LA), leaf display index (LDI), and individual leaf area per shoot (ILA), while the deciduous species A. coriacea had signifi cantly higher leaf numbers (LN). The more complex crown of H. stigonocarpa had shoots in more erect positions (orthotropic), with intense self-shading within shoots; A. coriacea, on the other hand, had slanting (plagiotropic) shoots in the crown, allowing similar irradiance levels to all leaf surfaces. The production of plagiotropic shoots by the deciduous species (A. coriacea) is a strategy that enables its use of incident sunlight early in the morning and preventing excessive water loss or excessive irradiance. Hymenaea stigonocarpa (an evergreen), by contrast, had orthotropic shoots and uses intense self-shading as a strategy to avoid excessive irradiance, especially at midday. Differences in crown architectures between evergreen and deciduous species of cerrado sensu stricto can therefore be viewed as adaptations to the environmental light regime.

show abstract

A handbook of protocols for standardised and easy measurement of plant functional traits worldwide

Cited by 3,384 publications

References 307 publications

Divergências funcionais e estratégias de resistência à seca entre espécies decíduas e sempre verdes tropicais

Divergências funcionais e estratégias de resistência à seca entre espécies decíduas e sempre verdes tropicais

The 'Herbivory Uncertainty Principle': application in a cerrado site

Relationships between crown architecture and available irradiance in two cerrado species with different leaf phenologies

Contact Info

Product

Resources

About